LOS ANGELES (CBS) — Brian Russell Kaplon, an exec with NBCUniversal, was shot in the chest and killed on St. Patrick’s day.

Today, a judge ruled that there was enough evidence to put David Andrews Armstrong, 32, on trial for the murder.

Back in March, Kaplon was in Armstrong’s Porter Ranch garage when he was shot in the chest by a military-style rifle.

Armstrong’s attorney James Blatt says it was all an accident. The two men were childhood friends.”They were drinking on St. Patrick’s day. And tragically, and unfortunately, my client fired a weapon as he stumbled and hit a very close friend.”

But all these months later, Kaplon’s widow and his younger brother are still searching for answers. They were both in court today. Brian’s widow was told not to talk to the media because she could be called as a witness.

His brother Jason speaks for the family when he says even happy occasions — like family weddings, or the birth of Kaplon’s twins (born weeks after he was gunned down) — are bittersweet and even sometimes “extremely sad.”

Kaplon says he is “angry. My bother is gone. So, I’m angry. I just want justice.”

Kaplon also says Armstrong hasn’t even apologized for his role in his brother’s death. “He just goes on with his day.”

Armstrong faces up to 25 years in prison if he is convicted.