Brian J. Doyle, 55, was arrested at his residence in Maryland on charges of use of a computer to seduce a child and transmission of harmful material to a minor. The charges were issued out of Polk County, Fla.
Doyle, of Silver Spring, Md., had a sexually explicit conversation with what he believed was a 14-year-old girl whose profile he saw on the Internet on March 14, the Polk County Sheriff's Office said in a statement.
The girl was really an undercover Polk County Sheriff's Computer Crimes detective, the sheriff's office said.
Doyle sent pornographic movie clips and had sexually explicit conversations via the Internet, the statement said.
During other online conversations, Doyle revealed his name, that he worked for the Homeland Security Department, and offered his office and government issued cell phone numbers, the sheriff's office said.