The father of 24-year-old Dodgers fan Jonathan Denver, killed in San Francisco following an L.A.-Giants game last week, pleaded over the weekend for witnesses to come forward.

See also: After Murder of L.A. Fan, SFPD to Go Undercover in Dodgers Gear.

A suspect, 21-year-old Michael Montgomery, was arrested only hours after the Wednesday night attack, but San Francisco District Attorney George Gascon, a former assistant chief at the LAPD, said there wasn't enough evidence to charge the suspect, who is from Lodi:

Montgomery was cut loose from jail on Friday.

Police said he'd made incriminating statements while in custody, but Montgomery has said that he was struck with or faced an incoming chair and allegedly pulled out a knife, according to numerous reports.

A second suspect was released without having been arrested.

Gascon's move raises the possibility of a self-defense issue, although the family of victim Jonathan Denver continues to say that victim Denver wouldn't hurt a fly. (And some are asking what kind of person who isn't expecting violence carries a knife?)

Robert Preece is Denver's father. He lives in Alhambra, works for the Dodgers as a security guard, and was at the reportedly four-on-four person fracas in the streets of San Francisco's South of Market district after the game.

On Sunday he pleaded for witnesses to come forward.

Denver, who was based in Fort Bragg, California, was celebrating his father's 49th birthday when the confrontation happened. The violence started over team allegiances, police indicated. Denver was said to have been wearing Dodgers gear.

Preece told San Francisco reporters this:

Losing a child is a heartache no parent should have to endure.

The Montgomery family is likely suffering as well. I am making a plea to the public asking that anyone who may have witnessed the incident to come forth so that both families can have some measure of closure. I believe that someone may have videotaped the incident so we can discover the truth.

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