MARTINEZ -- Jury deliberations are under way at the murder trial for a father and son charged in the shooting death of a 20-year-old Richmond man the day after a road rage confrontation in 2009.

The prosecution says that 51-year-old Charles "Mike" Titlow fatally shot Ricardo Colina in the neck from the driver's seat of his truck as his son, 24-year-old Charles "Chuck" Titlow, fought with Colina in an unincorporated area of West Contra Costa, near the intersection of San Pablo Avenue and Tara Hills Drive, on Aug. 19, 2009.

The prosecution and defense attorneys agree that Chuck Titlow chased down Colina to fight him the day after a road rage confrontation in which he twice rammed Colina's car with his truck, and gunned the truck at Colina after Colina had exited his vehicle.

Chuck Titlow was "obnoxious, immature, pugnacious," but he did not intend for Colina to get killed, his attorney, Laurie Mont argued in trial closing statements Thursday. Chuck was as surprised as anyone when someone shot Colina.

"He was a jerk, in summary, but that doesn't mean he committed murder," Mont said. "He also took a road rage incident and escalated it.

"This young man, along with his friends, just wanted to fight," Mont said.

Mike Titlow's attorney Tracee Clark argued that the father could not have fired the fatal shot based on the trajectory of the bullet. There are no witnesses that saw him fire that gun, and any circumstantial evidence that he is the shooter is based on statements by a self-serving witness who was looking to avoid being prosecuted himself.

"What parent would risk hitting their own kid?" Clark asked jurors. "No parent -- there was no plan."

Prosecutor Mary Knox said that Chuck Titlow, knowing his father would bring a gun, waited for his father to get there before attacking Colina. After the killing, Mike Titlow handed off the murder weapon to his son and his son's friend to hide, Knox said.

Colina's family cried in the audience as the prosecutor made her final plea to the jury: Convict Mike and Chuck Titlow of first-degree murder for the "senseless" killing of a "sweet, kindhearted young man."

Jury deliberations began late Thursday afternoon and continued Friday.

Contact Malaika Fraley at 925-234-1684. Follow her at Twitter.com/malaikafraley.