UPDATED: Man Accused Of Killing Lake Elsinore Teen Enters A Plea

A 44-year-old man accused with a teenage accomplice of fatally killing a 16-year-old Lake Elsinore boy and wounding his friend in the Presidential's neighborhood of Lake Elsinore earlier this year has entered a plea of not guilty.

Fernando Moreira Aresta of Lake Elsinore entered his plea Monday. He is charged with murder in the May 25 death of Lakeside High School student Bobby Henderson.

Aresta and a 16-year-old boy, whose identity was not released, were arrested Thursday morning after sheriff's deputies executed arrest warrants, said Lt. Joe Borja.

Aresta is charged with murder, assault with a deadly weapon resulting in great bodily injury and sentence-enhancing weapons allegations. On Monday, Aresta also pleaded not guilty to the assault with a deadly weapon charge, and he denied the other sentence-enhancing allegations.

Aresta's alleged accomplice is facing similar charges.

Aresta is being held at Smith Correctional Facility in Banning; his codefendant is being held at Southwest Juvenile Hall.

According to investigators, the attack happened around 11:30 p.m. on May 25 in Lake Elsinore's Presidential's neighborhood, near Garfield and Monroe streets. Deputies were called to the area to investigate an assault and found Henderson and his 18-year-old male friend, not identified, suffering from stab wounds, investigators said.

Henderson was lying on the ground, unconscious, and was rushed to a hospital, where he died a half-hour later, according to Sgt. Todd Torrenti.

Witnesses told investigators that Henderson was intervening in an attack on the 18-year-old when he was stabbed. The motive for the assault on the 18-year-old was unclear. He suffered non-life-threatening injuries, according to Torrenti.

Deputies were able to locate a blood trail leading away from the location of the assault, according to published reports, but how Aresta and the other defendant were ultimately identified has not yet been revealed. --City News Service and Toni McAllister contributed to this report.