Debbie Burns was 40 when she was shot in the head in her Pinellas County, Florida mobile home on August 15, 2004, the day after her birthday. Debbie had an intellectual disability caused by brain damage from scarlet fever and was asleep when the fatal shot was fired. Her sister, Barbara Ann Burns, was identified as the person who shot her.

Debbie’s decomposed body was discovered by movers who entered the mobile home. Barbara was arrested and charged with first-degree murder; she later confessed and led investigators to the revolver used in the killing.

What details might help clarify the motive and timeline leading up to August 15, 2004, or anyone who knew Debbie and her sister at that time?