Ryan Alan Modica, 39

April 11, 2011, 9:12 a.m.

Ryan Modica, a 39-year-old white man, was shot and killed Thursday, April 7, in the 1100 block of Del Sol Lane in Diamond Bar, according to Los Angeles County coroner's records.

Modica, originally from Concho, Ariz., was found about 11 a.m. lying in the driveway of a home with a gunshot wound to his upper torso. He was pronounced dead at the scene after deputies responded to a report of shots fired and assault with a deadly weapon.

The shooting occurred after an argument, authorities said.

Modica’s roommate was detained Thursday for questioning. He was still detained Friday morning, but sheriff’s officials had no information about whether he had been arrested.

Anyone with information about the death of Ryan Modica is asked to contact Crime Stoppers at (800) 222-TIPS (800) 222-8477.

-- Abby Sewell

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This source comes from ABC 7 Eyewitness News on April 7, 2011.

By Leanne Suter

DIAMOND BAR, Calif. -- Police said a suspect was taken into custody after a man was found shot to death in Diamond Bar on Thursday.

Authorities responded to the shooting in the 1100 block of N. Del Sol Lane near High Knob Road about 10:30 a.m. and found the shooting victim.

He was declared dead at the scene. His name has not been released.

Investigators said it was an argument between roommates that turned deadly.

Police say a suspect is in custody, but no further information was available.

Friends say the 39-year-old victim used to live at the home with the 23-year-old shooter, but that the older man was asked to leave last week after the two apparently had some sort of falling out.

Neighbors said the victim showed up Thursday morning and began fighting with his former roommate in the driveway and suddenly there was gunfire.

"Carl's a friend of mine, I love him like a son, and he got in the middle of the situation," said neighbor Marie Aguinaga. "There were maybe some threats. I think this man that got shot was out for revenge for some reason and I don't know the reasons why."

"We passed by and we saw the guy there on the floor," said another neighbor, Elizabeth Salinas. "We were shocked."

Authorities have not yet released the name of the victim.

Detectives said they didn't know if it was murder or possibly in self-defense. Friends of the shooter believe he was defending himself.

— Erst Oct. 28, 2014 at 8:40 a.m.