Killer Instinct is a true crime podcast in which Savannah, its host, rebuilds murder cases from the evidence investigators gathered. Episode titles pair a hook with a name. Read together, titles such as 'Love and Betrayal : Devon Guzman', 'A Tragic Friendship : Jessie Blodgett' and 'Murder of Husband # 5 : Joe and Sarah Hartsfield' show a steady pull toward cases tangled up in love, marriage and friendship. The storytelling focuses on the mechanics of each investigation. In the Jennifer Keese case, a parking-lot camera records a driver backing out to straighten his car, waiting exactly 32 seconds, and walking off toward Jennifer's complex. The footage was too poor to identify him, so investigators had people of different heights walk past the same gate, settling on a man between five foot three and five foot five. 'A Headless Mystery: The Dermond Murders' works the clock instead. Grocery store footage, a newspaper found on the kitchen table with the crossword apparently begun and an email opened on the morning of May 2nd let police narrow the window for the crime to a span ending just before a Derby party. A house left intact, valuables still in place, made a robbery gone wrong hard to credit. Phone records drive the Shea Briar story. Detectives already knew EJ had placed the last call to Shea shortly after midnight, yet they let her lie about it without pushing back, simply to see what she would say. Then a woman who had known EJ for years came forward with more. Savannah stops to spell out why a detail like that lie looked like a red flag, which keeps a long chain of evidence easy to track. Biography sits beside the procedure. The Hartsfield case moves through Sarah's marriages, with Joe as her fifth husband, plus an army enlistment at 22 and an affair during a deployment. It also recounts an alleged incident at a house that never led to a charge, since, as Savannah puts it, there is no such thing as attempted arson. In the Devon Guzman case, an exchange of rings between Devon and Michelle sours into an argument at Devon's dad's house once Michelle learns Devon is not leaving Carrie. The Jessie Blodgett episode widens to a separate attack three days earlier in Richfield, Wisconsin, where a woman walking her dog saw a man she had noticed sitting in a van run toward her with a knife. The bookends are informal: a hello to newcomers, reminders to subscribe, and a sign-off telling listeners to stay safe. Savannah says new episodes arrive on Wednesdays, with a video version on YouTube and a Patreon for exclusive episodes. What a listener gets is the case file, walked through with the reasoning left in.