The Greenfield Township Volunteer Fire Company says Christensen served as a probationary firefighter for a month last fall before he was released.
He is being held on $500,000 bail. It was not clear if he has a lawyer.
Police say Christensen talked about the fires while being questioned this month in a statutory rape case. He is also charged with the statutory sexual assault of a 15-year-old girl.
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Information from: The Scranton Times, http://www.scrantontimes.com/
