LITTLE ROCK — Jersey Bridgeman endured a lot in her young life, including abuse at the hands of her father and stepmother, but school officials say she was still a happy girl.

Now, with the couple away in prison for chaining her to a dresser last year, authorities are trying to figure out who killed the 6-year-old. Her body was found in a vacant house this week in Bentonville, a northwest Arkansas city best known as the home of Walmart’s headquarters.