Family, Neighbors Stunned by NorCal Rapist Arrest

A terrifying mystery solved.

Investigators say Roy Charles Waller is the man behind a series of sexual assaults spanning 15 years.

Waller was arrested as he arrived to work at UC Berkeley, where he has been employed for the past two decades.

Waller's former brother-in-law, who lives in Elverta, is in disbelief.

"I would say a happy-go-lucky kind of person, you know," John Ferris said. "Good attitude, funny maybe."

Neighbors at the Benicia home where he has lived with his wife are stunned.

"From a distance he seemed normal, he was cutting down the trees and pruning," Marsha Shigemotto said.

The NorCal Rapist's terrifying M.O. was always the same, targeting young Asian women.

One Sacramento victim came forward to share her story in 2006.

"Every time when he gets away with it, he'll just become bolder and do more harm," she said.

Over the years, police released suspect sketches, videos from ATM machines, and home surveillance cameras.

"He would bind them, and then repeatedly sexually assault them," Sacramento detective Avis Beery said.

Beery has worked on this case for a dozen years.

DNA technology--and the use of geneology website "GEDMatch" connected the heinous crimes to Waller.

"I can't say enough about the importance of that," Beery said.

An alleged secret life, exposed with hi-tech tools.

Investigators say this long-time public employee, Roy Charles Waller is the NorCal rapist.