Authorities say a 34-year-old woman’s ex fatally beat her, left her inside a minivan and set the vehicle on fire on I-75. Sarasota County Sheriff’s officials say they were called to a burning minivan on the interstate earlier this month. Deputies said Michael Clark was the driver, but told them he didn’t know how Kristen Kelly died or how the vehicle caught fire. Authorities say the couple had three children together and court records show a history of domestic violence. Medical examiners say she died blunt-force trauma. Clark is charged with murder, arson, tampering with evidence and possession of cocaine.