Police spokeswoman Margo Rohrbacher said the beating victim might have alerted police that Curtis Lawrence Anderson, 19, of Novato, is seen on MySpace.com kissing a 13-year-old girl.
That 13-year-old Novato girl allegedly was among 10 girls who assaulted the 16-year-old girl at Mission and Grand avenues around 8:30 p.m. after the market on May 22 in retaliation for implicating Anderson, police said. The 13-year-old girl was arrested at her middle school in Novato and has been booked into juvenile hall, Rohrbacher said.
The 16-year-old girl suffered cuts and bruises but was not taken to a hospital, Rohrbacher said.
Anderson was arrested April 15. He faces six felony charges and one misdemeanor charge in connection with the alleged sexual assault on a minor. His preliminary hearing is scheduled for Wednesday in Marin County Superior Court. He is being held in the county jail under $150,000 bail.
Rohrbacher said police also are trying to obtain a video of the beating that might have been taken by a 14-year-old girl but her father is reluctant to make it available because he fears for his daughter's safety.