SACRAMENTO, Calif. (AP) — A 60-year-old serial rapist in Northern California whose crimes went undetected for nearly three decades was sentenced to 897 years in state prison.

The Sacramento Bee reported that Roy Charles Waller, dubbed the “NorCal Rapist,” showed no emotion Friday and sat with eyes closed during sentencing. He declined to address the victims or the court.

A jury in Sacramento convicted Waller of raping nine women in their homes between 1991 and 2006 in six counties. Investigators used DNA technology and genealogy websites to zero in on Waller and arrested him more than two years ago.

A woman raped in 2006 testified that the day Waller was arrested was the first time she could take a shower without fear.

Waller says he is innocent.