The family of a woman accused of stabbing four people at a Target in West Hollywood said she suffered from mental illness.

Layla Rosetta Trawick, 34, of Antioch, Calif., entered the store at La Brea Avenue and Santa Monica Boulevard after noon and picked up two knives, apparently merchandise from the store.

Detectives from the Los Angeles County Sheriff's Department are still trying to determine a reason for the attack, which left one customer in critical condition and three others was lesser injuries.