A longtime Santa Clara County security officer is in jail arrested for alleged violent molestation of young family members and possession of child pornography.
The District Attorney's office says 49-year old Derrick Hammond of San Jose sexually abused two young girls for years starting when one was 11 and the other 5-years old.
Investigators say the girls lived with Hammond until his marriage ended in divorce.
Hammond worked as a county security officer assigned to Santa Clara Valley Medical Center since 2004.
He went on medical leave in January this year and officials say he began an 'unauthorized' leave of absence in March, which it turned out was when he was arrested.
The Santa Clara County Sheriff's department says the case came to light when the alleged victims got older and decided to come forward.
During the subsequent investigation, prosecutor Clarissa Hamilton says a hard drive belonging to Hammond was found containing violent, hard core child pornography.
"We were very cautious as we proceeded," Hamilton told KTVU, "we always try to resolve cases short of trial just to spare victims. It's very traumatic to go through the trial process so we start slow and ramp up if we feel it's warranted.”
"When I discovered the child pornography," Hamilton said, "I viewed him as more of a threat to public safety."
Court records obtained by KTVU show a list of 11-felony charges including 'lewd and lascivious acts on a child by forced violence, duress and fear', 'sexual battery of a victim', 'continuous sexual abuse of a child under 14 who is a resident' and 'possessing child pornography.'
Hamilton says the pornography was extremely graphic but, so far, no images of the alleged family victims have been found.
Sgt. Andrea Urena of the Sheriff's department said investigators cannot reveal many details but confirmed they are still looking through other evidence including Hammond's computer.
Hammond is being held in Santa Clara County jail on no bail and is scheduled to enter a plea in court on May 16th.
2 Investigates has confirmed that law enforcement agencies in the East Bay that use a controversial cell phone monitoring device are now looking to upgrade the system, potentially making it more powerful.