LAS VEGAS — It wasn’t long ago that the woman arrested in the deadly Las Vegas Strip sidewalk crash seemed to be doing well for herself.

After a rough childhood that included a period of homelessness in high school, Lakeisha Holloway had become an award-winning high school graduate and caring mother.

That recent picture of success deepens the mystery of how the former Oregon woman wound up in a Las Vegas jail and on suicide watch. The 24-year-old Holloway faces murder charges after authorities said she plowed her Oldsmobile into a sidewalk of tourists Sunday night, killing one person and injuring three dozen others while her 3-year-old daughter sat in the back seat.

After reviewing video surveillance footage, police said they believe Holloway drove up on the sidewalk deliberately.

They said she was homeless and out of money, sleeping in her car in parking garages. She might have been on her way to Texas to meet with the father of her daughter; the pair had split up some time ago.