SPOKANE, Wash. -

Treven Lewis entered a not guilty plea Tuesday for the death of a man who was trying to break up an underage drinking party.

Lewis, 18, said very little during his appearance Tuesday as he entered a not guilty plea to a second degree murder charge.

65-year-old Frank Motta was acting at the request of the homeowner who was out of town when her son's party spiraled out of control.

Detectives say Lewis is a gang associate and had admitted hitting Motta in the jaw back on March 10. The former principal and Air Force vet fell to the ground suffering multiple skull fractures when his head hit the floor.

Lewis says he got physical with Motta when the victim pushed his pregnant girlfriend, although investigators have not found any witnesses who will back up that self defense claim.

In fact it's Lewis who is accused of beating up a woman at a different party back in June because he thought she was a snitch. Lewis was waiting to stand trial on that charge when he had his run in with Motta.

In court Tuesday Lewis' public defender asked that trial be delayed until the second degree murder case gets underway.