PONTIAC - Livingston County authorities are investigating a gruesome and bizarre death today. A bystander in a parking lot in the 1000 block of West Reynolds Street called 911 about 4:30 a.m. today to report a tow truck driving erratically across two parking lots before it hit a sign and continued across a road into a ditch. When police arrived and inspected the vehicle, they found a decapitated body inside. They then found a human head in the parking lot where the caller first noticed the truck.