A Department of Defense rookie police officer was arrested after he arranged to get off work to have sex with a 13-year-old boy, according to charging documents. Matthew K. McMullen, 26, was arrested after he arrived at the prearranged meeting site in D.C. with a loaded pistol in his vehicle. McMullen, of Waldorf, was charged with enticing a minor to engage in sex. He faces a penalty of at least 10 years in prison if convicted. He remained behind bars Tuesday, and his first court appearance is scheduled from 2:30 p.m. Wednesday. A Navy spokesman said McMullen has worked at the Patuxent River Naval Air Station in St. Mary's County since September. According to charging documents, McMullen on Friday logged on to a Web site under the screen name "HKtop123," and sent a message to an undercover cop that read: "I'm as perved as they come." McMullen began having an online conversation with the undercover officer, who was posing as someone who was offering a teenage boy for sex. McMullen said he had sex with boys as young as 15 years old, court documents said. McMullen said he wanted to meet with the boy that afternoon but he had to go to work. McMullen then texted his supervisor, who gave him permission to begin his work four hours later than scheduled. McMullen agreed to meet with the man at a fast-food restaurant in D.C., and engage in a brief sex act with the undercover officer to prove that neither of them was working as a law enforcement officer. Then they'd go to a nearby apartment where the 13-year-old boy was waiting. McMullen was arrested by members of the child exploitation task force. Officers searched McMullen's car and found a loaded Glock 9 mm semiautomatic pistol in the trunk. McMullen said the gun was not his service weapon. http://washingtonexaminer.com/local/crime-punishment/2011/02/dod-officer-charged-enticing-teen-sex Wanna kill these ads? We can help!