A Corvallis man facing federal charges didn't show up for court, and a federal warrant has been issued for his arrest.

Mark Knapp, 34, was arrested in July and charged with aggravated identity theft. He failed to show up for a scheduled Oct. 30 appearance at U.S. District Court in Eugene.

Authorities began investigating Knapp, a prominent Corvallis anti-growth activist, in early July after a man in Minnesota reported two credit cards had fraudulently been opened in his name.

More than $10,800 had been charged to one of the cards. Two purchases totaling about $42,400 were made on the second card. The purchases were made at a coin company.

A search warrant was served at Knapp's apartment at 319 N.W. 12th St. and yielded $68,400 in gold coins and credit card statements and mail in other people's names.

At least six people have been identified as potential victims.

Knapp was released shortly after his arrest. Conditions of his release included not changing his address without approval from the U.S. Pretrial Services office.

He also was ordered to take care of any outstanding arrest warrants. Knapp had a misdemeanor warrant from Colorado that was issued in 1998. Failing to appear in federal court could result in Knapp being fined up to $250,000 or sentenced to a maximum of 5 years in prison.

Anyone with information about Knapp's whereabouts is asked to call Corvallis police at 766-6924 or U.S. Postal Inspector Shannon Roloff at 503-793-5899.