07/26/2009 AT 02:00 PM EDT
Former American Idol
contestant Alexis Cohen died early Saturday morning, the victim of a possible hit-and-run in Seaside Heights, N.J.
Cohen, 25, of Allentown, Pa., was found unresponsive on a street about 300 yards from where her car was parked in a lot, says Deputy Chief Michael Mohel of the Ocean County Prosecutor's Office.
Cohen auditioned for Idol
in seasons 7 and 8, gaining attention for her tirade against judge Simon Cowell
, who rejected her performance.
First aid workers took her to Community Medical Center in Tom's River, where she was pronounced dead at 6:35 a.m., he says.
An autopsy performed Saturday afternoon by the office of the Ocean County Medical Examiner found multiple traumatic chest and abdominal injuries, and a closed head injury, Mohel says.
"There was evidence that her body was impacted by a vehicle," he says, noting the death is classified as a homicide.
No arrests have been made, says Mohel, who would not say where Cohen was prior to her death due to the ongoing investigation.
Watch a YouTube clip of Cohen's Idol audition.