Santa Rosa police say they arrested a prolific graffiti tagger Thursday at her Rincon Valley home.

Police said Alisa Dolores Delao, 18, had vandalized numerous sites in Santa Rosa in the past six months. She goes by the tagger name "COSA," police said.

Police searched Delao's home and were able to obtain a $25,000 felony vandalism warrant. She is believed to be responsible for at least 21 acts of vandalism, police said.

She was booked into the Sonoma County Jail.