The mother who shot her four children and herself dead at her Port St. John, Fla., home on May 15 had two times the legal limit of alcohol in her system.

For reasons unknown to family and friends, Tonya Thomas, 33, used a Taurus .38-caliber revolver to fire shots into her children Joel Johnson, 12, Jazzlyn Johnson, 13, Jaxs Johnson, 15, and Pebbles Johnson, 17, before killing herself within a 35 minute period.

During that time, three of Thomas’ children ran to a neighbor’s house before the mother called them back home, according to police. Though, an autopsy report states that Pebbles likely passed out after returning.

Thomas was found dead on her couch from a self-inflicted gunshot wound to the head. The gun was still in her hand when cops found her.