(Richmond, IN)--A registered sex offender has now been charged with setting a house fire that injured a Richmond firefighter. The fire happened in January on North 15th. A man now identified as Mark Eisenburg was staying in a vacant home there with a homeless female. According to court documents, she asked him to leave and he became upset – ultimately setting fire to the front porch. A lieutenant with the Richmond Fire Department broke his ankle and is missing extensive time. Eisenburg also faces charges in other cases in Fayette County.