WEST CHESTER A West Chester man has been charged with threatening to kill two Philadelphia FBI agents and their family members through hundreds of e-mails and calls since 2009, according to federal authorities.

Justin Michael Credico, 32, also sent e-mails to the FBI demanding money, threatening to send computer viruses to foreign countries such as China and Russia and pledging to enroll in an Iranian university where he would send information to the international hackers group, Anonymous, according to an arrest affidavit.

Credico has been charged by the U.S. Attorney's Office with two counts each of threatening federal law enforcement officers and threatening the immediate family members of federal law enforcement officers.

Credico allegedly riddled his messages - including more than 850 e-mails sent over just four months in 2012 - with vulgar language and death threats and once claimed to have a flash drive that he could use to blow up the Chester County Courthouse in West Chester.

- Tricia L. Nadolny