VALIER, Mont. — The searchers rummage through the abandoned trailer, flipping over a battered couch, unfurling a stained sheet, looking for clues. It’s blistering hot and a grizzly bear lurking in the brush unleashes a menacing growl. But they can’t stop.

Not when a loved one is still missing.

The group moves outside into knee-deep weeds, checking out a rusted garbage can, an old washing machine — and a surprise: bones.

Ashley HeavyRunner Loring, a 20-year-old member of the Blackfeet Nation, was last heard from around June 8, 2017. Since then her older sister, Kimberly, has been looking for her.

She has logged about 40 searches, with family from afar sometimes using Google Earth to guide her around closed roads. She’s hiked in mountains, shouting her sister’s name. She’s trekked through fields, gingerly stepping around snakes. She’s trudged through snow, rain and mud, but she can’t cover the entire 1.5 million-acre reservation, an expanse larger than Delaware.

“I’m the older sister. I need to do this,” says 24-year-old Kimberly, swatting away bugs, her hair matted from the heat. “I don’t want to search until I’m 80. But if I have to, I will.”

Ashley’s disappearance is one small chapter in the unsettling story of missing and murdered Native American women and girls. No one knows precisely how many there are because some cases go unreported, others aren’t documented thoroughly and there isn’t a specific government database tracking these cases. But one U.S. senator with victims in her home state calls this an epidemic, a long-standing problem linked to inadequate resources, outright indifference and a confusing jurisdictional maze.

Now, in the era of #MeToo, this issue is gaining political traction as an expanding activist movement focuses on Native women — a population known to experience some of the nation’s highest rates of murder, sexual violence and domestic abuse.

“Just the fact we’re making policymakers acknowledge this is an issue that requires government response, that’s progress in itself,” says Annita Lucchesi, a cartographer and descendant of the Cheyenne who is building a database of missing and murdered indigenous women in the U.S. and Canada — a list of some 2,700 names so far.

As her endless hunt goes on, Ashley’s sister is joined on this day by a cousin, Lissa, and four others, including a family friend armed with a rifle and pistols. They scour the trailer where two “no trespassing” signs are posted and a broken telescope looks out the kitchen window. One of Ashley’s cousins lived here, and there are reports it’s among the last places she was seen.

“We’re following every rumor there is, even if it sounds ridiculous,” Lissa Loring says.

This search is motivated, in part, by the family’s disappointment with the reservation police force — a common sentiment for many relatives of missing Native Americans.

Outside, the group stumbles upon something intriguing: the bones, one small and straight, the other larger and shaped like a saddle. It’s enough to alert police, who respond in five squad cars, rumbling across the ragged field, kicking up clouds of dust. After studying the bones, one officer breaks the news: They’re much too large for a human; they could belong to a deer.

There will be no breakthrough today. Tomorrow the searchers head to the mountains.

For many in Native American communities across the nation, the problem of missing and murdered women is deeply personal.

“I can’t think of a single person that I know … who doesn’t have some sort of experience,” says Ivan MacDonald, a member of the Blackfeet Nation and a filmmaker. “These women aren’t just statistics. These are grandma, these are mom. This is an aunt, this is a daughter. This is someone who was loved … and didn’t get the justice that they so desperately needed.”

MacDonald and his sister, Ivy, recently produced a documentary on Native American women in Montana who vanished or were killed. One story hits particularly close to home. Their 7-year-old cousin, Monica, disappeared from a reservation school in 1979. Her body was found frozen on a mountain 20 miles away, and no one has ever been arrested.

There are many similar mysteries that follow a pattern: A woman or girl goes missing, there’s a community outcry, a search is launched, a reward may be offered. There may be a quick resolution. But often, there’s frustration with tribal police and federal authorities — and a feeling many cases aren’t handled urgently or thoroughly.

So why does this happen? MacDonald offers his own harsh assessment.

“It boils down to racism,” he argues. “You could sort of tie it into poverty or drug use or some of those factors … (but) the federal government doesn’t really give a crap at the end of the day.”

Tribal police and investigators from the federal Bureau of Indian Affairs serve as law enforcement on reservations, which are sovereign nations. But the FBI investigates certain offenses and, if there’s ample evidence, the U.S. Department of Justice prosecutes major felonies such as murder, kidnapping and rape if they happen on tribal lands.

Former North Dakota federal prosecutor Tim Purdon calls it a “jurisdictional thicket” of overlapping authority and different laws depending on the crime, where it occurred (on a reservation or not) and whether a tribal member is the victim or perpetrator. Missing person cases on reservations can be especially tricky. Some people run away, but if a crime is suspected, it’s difficult to know how to get help.

“Where do I go to file a missing person’s report?” Purdon asks. “Do I go to the tribal police? … In some places they’re underfunded and undertrained. The Bureau of Indian Affairs? The FBI? They might want to help, but a missing person case without more is not a crime, so they may not be able to open an investigation. … Do I go to one of the county sheriffs? … If that sounds like a horribly complicated mishmash of law enforcement jurisdictions that would tremendously complicate how I would try to find help, it’s because that’s what it is.”

Sarah Deer, a University of Kansas professor, author of a book on sexual violence in Indian Country and member of the Muscogee (Creek) Nation, offers another explanation for the missing and murdered: Native women, she says, have long been considered invisible and disposable in society, and those vulnerabilities attract predators.

“It’s made us more of a target, particularly for the women who have addiction issues, PTSD and other kinds of maladies,” she said. “You have a very marginalized group, and the legal system doesn’t seem to take proactive attempts to protect Native women in some cases.”

Those attitudes permeate reservations where tribal police are frequently stretched thin and lack training and families complain officers don’t take reports of missing women seriously, delaying searches in the first critical hours.

“They almost shame the people that are reporting, (and say), ‘Well, she’s out drinking. Well, she probably took up with some man,’” says Carmen O’Leary, director of the Native Women’s Society of the Great Plains. “A lot of times families internalize that kind of shame, (thinking) that it’s her fault somehow.”

The result: Some families start their own investigations.

Matthew Lone Bear spent nine months looking for his older sister, Olivia — using drones and four-wheelers, fending off snakes and crisscrossing nearly a million acres, often on foot. The 32-year-old mother of five had last been seen driving a Chevy Silverado on Oct. 25, 2017, in downtown New Town, on the oil-rich terrain of North Dakota’s Fort Berthold Reservation.

On July 31, volunteers using sonar found the truck with Olivia inside submerged in a lake less than a mile from her home. It’s a body of water that had been searched before, her brother says, but “obviously not as thoroughly, or they would have found it a long time ago.”

Lone Bear said authorities were slow in launching their search — it took days to get underway — and didn’t get boats in the water until December, despite his frequent pleas. He’s working to develop a protocol for missing person cases for North Dakota’s tribes “that gets the red tape and bureaucracy out of the way,” he says.

The FBI is investigating Olivia’s death. “She’s home,” her brother adds, “but how did she get there? We don’t have any of those answers.”

Other families have been waiting for decades.

Carolyn DeFord’s mother, Leona LeClair Kinsey, a member of the Puyallup Tribe, vanished nearly 20 years ago in La Grande, Oregon. “There was no search party. There was no, ‘Let’s tear her house apart and find a clue,’” DeFord says. “I just felt hopeless and helpless.” She ended up creating her own missing person’s poster.

“There’s no way to process the kind of loss that doesn’t stop,” says DeFord, who lives outside Tacoma, Washington. “Somebody asked me awhile back, ‘What would you do if you found her? What would that mean?’… It would mean she can come home. She’s a human being who deserves to be honored and have her children and her grandchildren get to remember her and celebrate her life.”

It’s another Native American woman whose name is attached to a federal bill aimed at addressing this issue. Savanna LaFontaine-Greywind, 22, was murdered in 2017 while eight months pregnant. Her body was found in a river, wrapped in plastic and duct tape. A neighbor in Fargo, North Dakota, cut her baby girl from her womb. The child survived and lives with her father. The neighbor, who pleaded guilty, was sentenced to life without parole; her boyfriend’s trial is set to start in September.

In a speech on the Senate floor last fall, North Dakota Democrat Heidi Heitkamp told the stories of four other Native American women from her state whose deaths were unsolved. Displaying a giant board featuring their photos, she decried disproportionate incidences of violence that go “unnoticed, unreported or underreported.”

Her bill, “Savanna’s Act,” aims to improve tribal access to federal crime information databases. It would also require the Department of Justice to develop a protocol to respond to cases of missing and murdered Native Americans and the federal government to provide an annual report on the numbers.

At the end of 2017, Native Americans and Alaska Natives made up 1.8 percent of ongoing missing cases in the FBI’s National Crime Information Center database, even though they represent 0.8 percent of the U.S. population. These cases include those lingering and open from year to year, but experts say the figure is low, given that many tribes don’t have access to the database. Native women accounted for more than 0.7 percent of the missing cases — 633 in all — though they represent about 0.4 percent of the U.S. population.

“Violence against Native American women has not been prosecuted,” Heitkamp said in an interview. “We have not really seen the urgency in closing cold cases. We haven’t seen the urgency when someone goes missing. … We don’t have the clear lines of authority that need to be established to prevent these tragedies.”

In August, Sen. Jon Tester, a Montana Democrat, asked the leaders of the Senate Committee on Indian Affairs to hold a hearing to address the problem.

Lawmakers in a handful of states also are responding. In Montana, a legislative tribal relations committee has proposals for five bills to deal with missing persons. In July 2017, 22 of 72 missing girls or women — or about 30 percent — were Native American, according to Montana’s Department of Justice. But Native females comprise only 3.3 percent of the state’s population.

It’s one of many statistics that reveal a grim reality.

On some reservations, Native American women are murdered at a rate more than 10 times the national average and more than half of Alaska Native and Native women have experienced sexual violence at some point, according to the U.S. Justice Department. A 2016 study found more than 80 percent of Native women experience violence in their lifetimes.

Yet another federal report on violence against women included some startling anecdotes from tribal leaders. Sadie Young Bird, who heads victim services for the Three Affiliated Tribes at Fort Berthold, described how in 1½ years, her program had dealt with five cases of murdered or missing women, resulting in 18 children losing their mothers; two cases were due to intimate partner violence.

“Our people go missing at an alarming rate, and we would not hear about many of these cases without Facebook,” she said in the report.

Canada has been wrestling with this issue for decades and recently extended a government inquiry that began in 2016 into missing and murdered indigenous women. A report by the Royal Canadian Mounted Police concluded that from 1980 to 2012 there were 1,181 indigenous women murdered or whose missing person cases were unresolved. Lucchesi, the researcher, says she found an additional 400 to 500 cases in her database work.

Despite some high-profile cases in the U.S., many more get scant attention, Lucchesi adds.

“Ashley has been the face of this movement,” she says. “But this movement started before Ashley was born. For every Ashley, there are 200 more.”

Browning is the heart of the Blackfeet Nation, a distinctly Western town with calf-roping competitions, the occasional horseback rider ambling down the street — and a hardscrabble reality. Nearly 40 percent of the residents live in poverty. The down-and-out loiter on corners. Shuttered homes with “Meth Unit” scrawled on wooden boards convey the damage caused by drugs.

With just about 1,000 residents, many folks are related and secrets have a way of spilling out.

“There’s always somebody talking,” says Ashley’s cousin, Lissa, “and it seems like to us since she disappeared, everybody got quiet. I don’t know if they’re scared, but so are we. That’s why we need people to speak up.”

Missing posters of Ashley are displayed in grocery stores and the occasional sandwich shop. They show a fresh-faced, grinning woman, flashing the peace sign. In one, she gazes into the camera, her long hair blowing in the wind.

One of nine children, including half-siblings, Ashley had lived with her grandmother outside town. Kimberly remembers her sister as funny and feisty, the keeper of the family photo albums who always carried a camera. She learned to ride a horse before a bike and liked to whip up breakfasts of biscuits and gravy that could feed an army.

She was interested in environmental science and was completing her studies at Blackfeet Community College, with plans to attend the University of Montana.

Kimberly said Ashley contacted her asking for money. Days later, she was gone.

At first, her relatives say, tribal police suggested Ashley was old enough to take off on her own. The Bureau of Indian Affairs investigated, teaming up with reservation police, and interviewed 55 people and conducted 38 searches. There are persons of interest, spokeswoman Nedra Darling says, but she wouldn’t elaborate. A $10,000 reward is being offered.

The FBI took over the case in January after a lead steered investigators off the reservation and into another state. The agency declined comment.

Ashley’s disappearance is just the latest trauma for the Blackfeet Nation.

Theda New Breast, a founder of the Native Wellness Institute, has worked with Lucchesi to compile a list of missing and murdered women in the Blackfoot Confederacy — four tribes in the U.S. and Canada. Long-forgotten names are added as families break generations of silence. A few months ago, a woman revealed her grandmother had been killed in the 1950s by her husband and left in a shallow grave.

“Everybody knew about it, but nobody talked about it,” New Breast says, and others keep coming forward — perhaps, in part, because of the #MeToo movement. “Every time I bring out the list, more women tell their secret. I think that they find their voice.”

Though these crimes have shaken the community, “there is a tendency to be desensitized to violence,” says MacDonald, the filmmaker. “I wouldn’t call it avoidance. But if we would feel the full emotions, there would be people crying in the streets.”

His aunt, Mabel Wells, would be among them.

Nearly 40 years have passed since that December day when her daughter, Monica, vanished. Wells remembers every terrible moment: The police handing her Monica’s boot after it was found by a hunter and the silent scream in her head: “It’s hers! It’s hers!” Her brother describing the little girl’s coat flapping in the wind after her daughter’s body was found frozen on a mountain. The pastor’s large hands that held hers as he solemnly declared: “Monica’s with the Lord.”

Monica’s father, Kenny Still Smoking, recalls that a medicine man told him his daughter’s abductor was a man who favored Western-style clothes and lived in a red house in a nearby town, but there was no practical way to pursue that suggestion.

He recently visited Monica’s grave, kneeling next to a white cross peeking out from tall grass, studying his daughter’s smiling photo, cracked with age. He gently placed his palm on her name etched into a headstone. “I let her know that I’m still kicking,” he says.

Wells visits the gravesite, too — every June 2, Monica’s birthday. She still hopes to see the perpetrator caught. “I want to sit with them and say, ‘Why? Why did you choose my daughter?’”

Even now, she can’t help but think of Monica alone on that mountain. “I wonder if she was hollering for me, saying, ‘Mom, help!’”

Ash-lee! Ash-lee!! Ash-lee! Ash-lee!!

Some 20 miles northwest of Browning, the searchers have navigated a rugged road lined with barren trees scorched from an old forest fire. They have a panoramic view of majestic snowcapped mountains. A woman’s stained sweater was found here months ago, making the location worthy of another search. It’s not known whether the garment may be Ashley’s.

First Kimberly, then Lissa Loring, call Ashley’s name — in different directions. The repetition four times by each woman is a ritual designed to beckon someone’s spirit.

Lissa said Ashley’s disappearance constantly weighs on her. “All that plays in my head is where do we look? Who’s going to tell us the next lead?”

That weekend at the annual North American Indian Days in Browning, the family marched in a parade with a red banner honoring missing and murdered indigenous women. They wore T-shirts with an image of Ashley and the words: “We will never give up.”

Then Ashley’s grandmother and others took to a small arena for what’s known as a blanket dance, to raise money for the search. As drums throbbed, they grasped the edges of a blue blanket. Friends stepped forward, dropping in cash, some tearfully embracing Ashley’s relatives.

The past few days reminded Kimberly of a promise she’d made to Ashley when their mother was wrestling with substance abuse problems and the girls were briefly in a foster home. Kimberly was 8 then; Ashley was just 5.

“’We have to stick together,’” she’d told her little sister.

“I told her I would never leave her. And if she was going to go anywhere, I would find her.”