Alapeti Tunoa Jr., accused of beating his former girlfriend to death on a quiet Kailua residential street last year, is scheduled to admit guilt in the case tomorrow morning and to be sentenced later in the day.

Tunoa reached an apparent plea agreement with prosecutors this week but specifics of the deal could not be determined yesterday afternoon.

James Fulton, spokesman for Prosecutor Peter Carlisle, declined comment. Deputy Public Defender Jason Burks, who represents Tunoa, could not be reached for comment.

Tunoa, 31, has been held without bail since he was charged with second-degree murder in the Jan. 16, 2008, death of Janel Tupuola, 29.

Witnesses said the 6-foot-2, 340-pound Tunoa beat the slightly built Tupuola with the butt of a shotgun while she screamed and clung to a sign pole near the corner of Maluniu Avenue and Kawainui Street.

A 69-year-old resident in the area tried to intervene but Tunoa allegedly struck him on the head with the shotgun.

Tupuola, a mother of five, had recently broken up with Tunoa, a construction worker.

Family members of the victim said Tunoa had been stalking her. Witnesses said he caught up with her about 5:45 in the evening, repeatedly ramming her car with his own. He then allegedly drag- ged her from the car and brutally beat her until she stopped screaming and lay senseless on the ground.

Tunoa was charged with murder, terroristic threatening, assault of the bystander and three firearms charges.

According to court filings this week, Tunoa is scheduled to enter a change of plea in the case tomorrow morning before Circuit Judge Randal Lee.

Another hearing is set for 1 p.m. tomorrow, in which Lee will determine Tunoa's sentence.

Tunoa has a long criminal record, which includes crimes of violence. He was paroled from prison in 2001 after serving time for two robbery convictions. He had some 67 arrests as a juvenile.