QUANTICO, Va. -- Another guilty verdict for Internet Crimes Against Children is now in the books, according to Air Force legal officials. 

The outcome stems from the ICAC courts martial, levied against Airman First Class Christopher Dean, of the 603rd Air and Space Operations Center, Ramstein Air Base, Germany.

On Nov.17, 2014, Dean responded to an OSI undercover agent ad using Yahoo! Messenger.

Dean and the UCA who portrayed himself as a 14 year-old girl exchanged short messages. Throughout the conversations, Dean made numerous explicit sexual propositions to the UCA.

On Dec.10, 2014, Dean arrived at a designated location with condoms and an iPad to watch porn together with the 14-year old girl. Office of Special Investigations Special Agents from the 13 Field Investigations Squadron, Ramstein AB, Germany, apprehended him and seized his phone, iPad and condoms after he knocked on the door.

The trial found Dean guilty of Attempted Sexual Assault of a Minor (Article 80) and guilty of Lewd Acts over the Internet with a Minor (Article 80).

Dean was sentenced to four months confinement, a dishonorable discharge and will be registered as a sex offender.

The lead case agent was SA Adam Frashure.

"He [Frashure] is a phenomenal performer. We're very proud of him and the entire 13 FIS as all pulled together for the surveillance and take-down op," said Lt. Col. Christopher Ouellette, 13 FIS commander. "Kudos also to Special Agent Kyle Tulip, 4 FIS, for tech support, via surveillance, at the apprehension location."