SAN FRANCISCO -- The man charged with the brazen daylight sidewalk killing of Oakland journalist Chauncey Bailey had been convicted of a brutal assault and robbery on a San Francisco municipal transit train and served a year in jail, authorities have revealed.

The video released Friday by San Francisco police showed Devaughndre Broussard involved in a violent Halloween 2005 evening assault aboard the train. Patrick Hall, 20, is seen on the security tape on the crowded Muni train, listening to his iPod when suddenly five people attack. Among them clearly visible is Broussard.

The video showed the victim being kicked and punched, his nose and mouth bloodied; he eventually falls forward out of the frame. His wallet and iPod were stolen.

"A witness identified one of the suspects as Mr. Broussard," said San Francisco Police SGT. Steve Mannina. "He was later charged with one count of robbery and one count of assault with a deadly weapon."

Faced with the video evidence, Broussard pleaded guilty to assault. According to the family the victim -- former San Francisco supervisor and current mayoral candidate Tony Hall -- he still suffers from the attack.

"He suffered severe damage," Hall said of his nephew. "He was in the hospital for about a week and he was really traumatized."

Hall said he was shocked at the brutality of the attack. But he's even more outraged at what he considers Broussard's light sentence for the crime and early release.

"It's a horrible thing to happen to someone who's innocent like that and have no one come to his help," Hall said of the attack. "What's even worse than that is those kids that did it -- I call them punks -- did that and got away with it."

In response, San Francisco District Attorney Kamala Harris issued this statement on the Broussard case:

"(Broussard) was sentenced consistent with first time offenders and served a year in county jail. This defendant was also ordered to three years supervised probation so authorities could track his activities."

Hall says Harris did not do her job.

"I think any district attorney with any sense of obligation would have the moxey to put away a kid like this," he said.

Broussard was released from San Francisco County Jail last July.

In published reports, Broussard's probation officer described him as "quiet, respectful and compliant". But the officer said while he was locked up those very traits made him gravitate to the Nation of Islam.

Within months of his release the report says Broussard told his probation officer he was working at "Your Black Muslim Bakery" -- an association that led to his arrest in Bailey's murder.

Broussard is being held in Alameda County Jail on first degree murder in Bailey's death. He has pleaded not guilty.