HOLLYWOOD, Calif. — A man suspected of stalking Dr. Drew Pinsky has pleaded not guilty to six felony counts against him, the Associated Press reports.

Charles William Pearson, 33, entered his not guilty pleas Friday in Pasadena Superior Court after being arrested Wednesday evening in Woodland Hills, Calif.

Police say the television and radio personality contacted authorities after the man posted several threats online towards Pinsky and his family. He also showed up at the Los Angeles radio station where Pinsky works.

Pearson's bail has been increased to $400,000 from $150,000 at the prosecution's request.

Pinsky, 51, is an addiction specialist who hosts the popular radio program Loveline on Los Angeles station KROQ. He also hosts several VH1 reality shows, including Celebrity Rehab.