During the police department's initial investigation into the gun crimes charges against Denis Shevchenko in October, a search warrant revealed electronic devices, in which investigators said they discovered images and videos of child pornography.
The gang members, suspects in several violent crimes over the past six months, were arrested last week in San Jose as part of a sting that netted weapons and stolen property.
A 20-year-old California would remove guns from people deemed too dangerous to be armed. The measure, plagued by problems, has not achieved its promise.