Tijuana police arrested the prime suspect in a slaying that united City College in October 2010.

On Feb.20 San Diego police announced that Armando Perez was arrested in the early morning hours on Avenida Revolución in downtown Tijuana. He is suspected of having slain City College student Diana Gonzalez.

Hours later, Tijuana police presented him to the press, an event witnessed by the victim’s mother, Concepción Gonzalez.

“My daughter is not going to come back, but this gives me some peace,” she said according to the San Diego Union Tribune.

She reportedly began to sob as Perez was brought into the room.

“Why did you do this to her?” she repeatedly asked Perez, according to the paper.

Perez is said to have sobbed and said he was sorry in a low voice.

He is to be extradited to the United States, where he will be charged with murder.

Gonzalez, a nursing student, was found stabbed to death in a men’s bathroom in M building on the evening of Oct. 12, 2010.

As details emerged, it became clear that Gonzalez was a victim of domestic violence. Three weeks before her death, she reported to police that her estranged husband, Perez, then 35, had abducted, assaulted and raped her in a motel room.

Perez was detained by police but was released days later when the District Attorney’s office decided not to file charges, citing insuficient evidence. Perez’s release outraged the community, particularly Latino families, when details of Gonzalez’s story emerged.

Her murder united City College against domestic violence. Students, faculty and staff held a candlelight vigil in Gorton Quad two days after her murder.

Since then several events have been held by campus organizations, like Bringing Education and Activism Together (BEAT) and Visionary Feminists, to help the family and create a scholarship for Gonzalez’s daughter.

Most of the proceeds of the production of “The Vagina Monologues” on Feb. 24 and 25 on campus will go to the Gonzalez family.