A Boyertown man who admitted having sex with an underage girl in Perkiomen Township has been given 10 to 20 years in state prison. 49-year-old Dwayne Maurer, who also gave an East Greenville address, pleaded guilty late last year in Montgomery County Court. As a sexually violent predator under Megan’s Law, he must report his address to the state police for the rest of his life after his release from prison. The girl said Maurer was using marijuana and blowing the smoke into her face, trying to get her to smoke it, at the time of the assaults. She was under the age of 13 when two incidents occurred between 2002 and 2007, and police started investigating after she told her psychologist about the abuse.