RICHMOND -- Two brothers from a well-known Crockett family were acting in self-defense during a bloody, late-night fight that ended in a stabbing last month, their lawyer argued in court Wednesday.

Donald and Richard Zampa made their first court appearance after their arrest Tuesday night in the attack on a 29-year-old man as the downtown bar crowd spilled onto the streets Oct. 26.

Donald Zampa, 21, was arrested on suspicion of attempted murder and for making criminal threats while Richard Zampa, 24, is facing a charge of assault with a deadly weapon.

Dressed in yellow jail garb, the brothers stood side by side, with their father, mother and two sisters looking on from the gallery's front row as defense attorney Dustin Gordon presented photos of the 24-year-old Zampa with a black eye and a stab wound to his hand. The attorney said the 29-year-old man identified by prosecutors as the victim drew first blood by stabbing Richard Zampa, prompting the fight in which police say Donald Zampa stabbed the 29-year-old.

After the fight, prosecutors say, the Zampas headed to the Crockett firehouse on Loring Avenue, where Donald Zampa, a volunteer firefighter there, made criminal threats. The 29-year-old, who witnesses have said was bleeding "head to toe," was flown to John Muir Medical Center in Walnut Creek and later released.

"This is clearly a melee," Gordon said. "It's not attempted murder."

Gordon's arguments were made before Judge Leslie Landau in an unsuccessful attempt to convince the judge to significantly lower the bail for his clients or have them released on their own recognizance. Landau set Donald Zampa's bail at $605,000 and Richard Zampa's at $50,000.

The Zampas come from a long line of Crockett ironworkers and are the great-grandsons of famed ironworker Alfred Zampa, who died in 2000, and was celebrated for his contributions in the construction of various Bay Area bridges. The western span of the Carquinez Bridge is named after him, and he was one of the first workers to survive a fall from the Golden Gate Bridge during its construction.

The brothers were first arrested in connection with the attack last month, but were released pending investigation into the incident. They were formally charged Tuesday, and remained in custody Wednesday.