SYRACUSE - A Rochester man has been charged in a shooting at an underage drinking party that injured four people, including a teenager who later died.

David Acevedo-Mateo, 26, was charged with second-degree murder and attempted murder. He pleaded not guilty at arraignment Friday in Syracuse City Court and was ordered held without bail.

“The process is just beginning,” said defense lawyer Michael Vavonese. “We'll be taking a good look at why they're making these allegations.”

A preliminary hearing was scheduled for Wednesday.

Police said the shooting occurred early Sunday morning at party attended by between 60 and 100 people, most of them minors.

One of the victims - 15-year-old Jamar Rolfe of Syracuse - was shot in the head and died Thursday at University Hospital, resulting in the murder charge. Acevedo-Mateo was charged with attempted murder for the shooting of Carlos Rivera, 16, who was in fair condition Friday at University Hospital.

Another teen shot in the head, 16-year-old Ismaeliz Pizzaro-Quinones, remained in critical condition. The fourth victim was a 32-year-old man who was shot in the leg.

Acevedo-Mateo was arrested by Syracuse Police and U.S. Marshals outside a Rochester apartment complex Thursday afternoon, Syracuse Police Chief Gary Miguel said at a news conference Friday.

“This was over drug sales and competition in drug sales with Mr. Rolfe,” Miguel said.

Police are uncertain if Acevedo-Mateo was the only shooter, he said.

Rolfe had a loaded .380-caliber handgun in his pocket when he was shot, said the police chief.

AP-ES-01-09-09 1604EST