CAPE ELIZABETH — Cole Amorello was driving under the influence of alcohol the night he crashed his car last month on Old Ocean House Road.

Police, who have made limited progress in their investigation into the party Amorello attended the night of the crash, have also all but stopped working on the case.

Amorello, 17, died April 11 from injuries received in the crash, which happened at 5 a.m. April 9. Police this week said tests determined Amorello’s blood alcohol content was 0.092 percent.

The legal limit for drivers is a blood alcohol content of less than 0.08 percent.

Police said tests didn’t reveal any other unusual substance in the Cape Elizabeth High School junior’s system, but they have said speed was also a factor in the crash.

Amorello crashed a 2006 BMW sedan into a cluster of trees while driving southbound on Old Ocean House Road. He only possessed a learner’s permit and was alone in the car. Maine law requires permit holders to be accompanied by licensed drivers who are at least 20 years old.

Police have been investigating a party Amorello attended the night of April 8, but Chief Neil Williams on Thursday said the investigation hasn’t provided many answers.

“We’ve exhausted all our leads at this particular juncture,” he said. “If we get more information, we’ll investigate further.”

Williams said police have interviewed several people who may have been at the party, some of whom were older than 18. He said there were no parents present, and the host of the party was under 18.

No charges have been filed against anyone who may have supplied alcohol at the gathering.

“In this particular case, no one was summonsed,” Williams said. “There was no proof as to who was drinking or who brought alcohol.”

Usually summonses are served in cases of an underage drinking party, Williams said, but since police didn’t know about the April 8 event until after the fact, they can’t prove who was drinking.

Williams said police have determined there was no alcohol in the house prior to the party, and police are trying to figure out where it came from and who supplied it.

“I think the (Amorello) family would like to find out where it came from, and so would we,” he said.

Police “actively went out” and talked with owners of local stores that sell alcohol, Williams said, but they couldn’t trace where the alcohol originated.

Williams said the investigation will remain open, but at this point police are waiting for someone to come forward with additional information.

Kate Gardner can be reached at 781-3661 ext. 125 or kgardner@theforecaster.net. Follow her on Twitter: @katevgardner.

Cole Amorello, 17, of Cape Elizabeth, died April 11 from injuries he received in a single-car crash April 9.