A man thought to be responsible for a series of attacks in D.C. and Maryland spanning the 1990s is in police custody.

Giles Warrick, known as the “Potomac River Rapist,” has been charged in connection with a series of crimes starting in 1991 and ending in 1998 with the rape and murder of Christine Mirzayan, a 29-year-old National Academy of Sciences intern, in Georgetown, according to WTOP. He was arrested by police in Horry County, South Carolina earlier this week and is being held without bond.

Warrick will be charged with first-degree murder and the sexual assaults he allegedly committed in the District before being moved to Montgomery County for further processing, said D.C. Chief of Police Peter Newsham at a press conference on Thursday.

Montgomery County Chief of Police Marcus Jones confirmed that the department has already filed six charges against Warrick considered “DNA perfect matches.”

He added that the department cross-referenced DNA found across the different crime scenes with publicly available information on hereditary sites like Ancestry.com to track down potential relatives of the perpetrator. Now that Warrick’s DNA has been identified and systematized, it will be cross-examined with other unsolved cases in the area.

“We are now able to give victims who have been impacted tremendously … a little bit of justice you might say, a closure,” Jones said.

The eight attacks Warrick is accused of in Montgomery County between 1991 and 1997 followed a similar pattern of stalking victims and attacking them inside their home, according to post on the Metropolitan Police Department’s website from 2012. Both D.C. sexual assaults involved victims walking home on a Saturday night, being pulled into nearby woods, and attacked.

It wasn’t until 2012 that D.C. police used DNA evidence to link the 1996 attack of a woman in Palisades to the “Potomac River Rapist.”

Warrick was apprehended through a joint investigation between the D.C. and Montgomery County police departments. A trial date has not been set.

This story originally appeared on WAMU.