WAUSAU — A 32-year-old Wausau man who spent 12 years behind bars for child sex crimes is facing new charges after a family member came forward with accusations against him.

Kyleley E. Olds was already facing 16 felony counts of possessing child pornography as a repeat offender in a separate case filed in April in Marathon County Circuit Court. The April case is tied to a tip from Google that led police to discover dozens of photos and videos allegedly depicting child pornography on the man’s phone.

Olds now faces charges of repeated sexual assault a child, incest, and causing a child younger than 13 to view a sex act. The most recent charges were filed Tuesday, June 19 in Marathon County Circuit Court.

The new charges are the result of an investigation that began when a now-20-year-old woman told police that she had been repeatedly assaulted by Olds in 2002 and 2003, when the woman was about 5 years old.

In the April case, police were alerted via a cyber tip that Google search engines had detected images of child pornography on a phone that was later traced to Olds, according to court documents. The tip was routed through the National Center for Missing and Exploited Children, which is routinely notified when Google or other internet providers discover such images.

Google can detect child pornography with a widely used digital fingerprinting system — called “hashing” — that allows companies and law enforcement to detect known child pornography in electronic services like Gmail. Google said it has been using hashing since 2008.

The information was enough for investigators to secure a warrant. The resulting search turned up a notebook filled with writing that contained internet web pages containing potential child pornography, police said. Even more damning, however, were the graphic images and videos that depicted infants, toddlers, and elementary school children being sexually abused, according to court documents.

Court records show that Olds had been serving a 10-year probation term stemming from a 2003 conviction of first degree sexual assault of a child. In that case, Olds was initially given probation and a suspended sentence, but in January 2009 his probation was revoked. During a revocation hearing, now-retired Judge Vincent Howard sentenced Olds to 12 years in prison, with 1,147 days credit for time served. He completed his initial prison term in November and was released, and is a lifetime sex offender registrant. He returned to prison in May.

An initial appearance for the latest round of charges is set for Monday.