Largo Police Detective C. Monaghan patrols the Internet for people who choose to victimize children through the use of computers, according to police.
He chatted online Monday as a part of this work with the FBI's Innnocent Images Task Force and the Internet Crimes Against Children Task Force.
Monaghan used the persona of an adult mother of a 13-year-old female on Monday. During an alleged conversation with William Casey, the casual conversation turned into a sexual conversation, according to police.
"Casey eventually made arrangements and expressed a strong desire to have sexual relations with the Detective Monaghan's persona and the persona's 13 year old daughter," police said.
Through the online chat Casey arranged to meet with Monaghan's online persona at Taylor Park on June 5 around 2 p.m.
"If they were to 'like one another', they would go further with their sexual arrangements involving the three parties," according to police.
Casey arrived at Taylor Park around 2:05 p.m. on Tuesday and met with several Largo Police Department detectives.
Casey, 74, was arrested on the charges of traveling to meet a minor for sex acts and enticing a parent to consent to sex act with their minor child. Total bond was set at $40,000. He is being held at the Pinellas County Jail.
According to police, a subsequent interview with Casey revealed admissions to other sex crimes, which are decades old. These admissions are currently under investigation.