VIDEO : Kid Rock's Personal Assistant Killed in an ATV Accident on Rock's Property

Ben Gabbe/Getty Images It is a tragic day for Kid Rock . The 45-year-old Grammy nominee announced on his website Tuesday that his personal assistant, Mike Sacha, has died. According to a press release from police, the 30-year-old was killed in an apparent ATV accident on Rock's Nashville property Monday night. After the musician held a cookout at his house, Sacha was reportedly transporting guests to the house's driveway for an Uber car. Authorities said in a press release they believe he lost control and crashed on the ride back to the house around midnight.