PULLMAN, Wash. - Kenneth Downing, an Elk man arrested for a string of home invasions and sexual assaults in Pullman nearly 20 years ago, has pleaded guilty to first-degree rape and assault charges. 

Downing is now facing 18 to 24 years in prison, Whitman County's Chief Prosecutor Dan LeBeau announced Friday.

Downing was arrested at a work site in Spokane in March after Pullman authorities worked with a forensic genetic genealogy team to identify him as a suspect. 

If Downing is released from prison, he will be registered as a sex offender and be under lifetime supervision from the department of corrections. 

Downing's sentencing is scheduled for August 19.