Brianna Harmon was a 25-year-old EMT from Chattanooga who was found dead inside a home on Thrush Hollow Lane on October 10, 2024. First responders located her body on a couch, partially covered by a white blanket and a black shirt. An investigation determined she died from a single gunshot wound to the back of her head.

The case developed after a woman at a Publix used the store phone to call 911 and falsely claimed to be the pregnant girlfriend of the victim’s sister’s husband, confessing to the killing but giving a wrong location. Deputies traced the call and found the caller still on the line; she was identified as Brianna’s 27-year-old sister, Brittani Harmon. Brittani told detectives she had seen Brianna alive on the couch using her phone before she left and took a Lyft to the grocery store, but could not account for the time between that sighting and when Brianna’s body was found.

Investigators say Ring camera footage showed only Brittani entering and leaving the residence around the time of the shooting, and a gun believed to be the murder weapon was recovered from the spare tire hatch of the vehicle she drove to the Publix. Brittani was arrested and charged with first-degree murder and, following a separate January 2026 conviction for aggravated arson, was awaiting trial on the murder charge. Does anyone have information about Brianna’s last hours or the timeline inside the house?