PORTLAND — A Biddeford man who uploaded sexually explicit images of his ex-fiancée to the Internet and created a social media account in her name, inviting men to her home for sexual encounters, has been sentenced to five years in federal prison.

Shawn Sayer, 43, was sentenced Tuesday in U.S. District Court in Portland by Judge D. Brock Hornby to the statutory maximum sentence, along with three years of supervised release. He pleaded guilty to cyberstalking Aug. 13.

Court records show Sayer used the Internet in 2009 to harass his ex-fiancée, who had changed her name and moved to Louisiana. He posted sexually explicit video clips of her to adult pornography websites using her real name and actual street address; created a Facebook account in her name in which he posted her photographs and hyperlinks to the videos, and wrote that she was interested in a number of sexual activities. As well, he created dozens of Yahoo! Messenger profiles using some variation of her name, using sexually explicit photographs of her, and inviting men to her residence for sexual encounters.

As a result, numerous men whom she didn’t know arrived on her doorstep in Louisiana seeking sexual encounters with her, terrifying her and causing her to fear that she could be sexually assaulted or otherwise physically harmed, according to a prepared statement issued Tuesday afternoon by U.S. Attorney Thomas E. Delahanty.

Although the charges refer to incidents occurring in 2009, the victim said visits from strange men looking for sex began in October 2008 while she was living in South Portland. In one incident, there was a physical altercation with one of the strangers that caused her to flee her home for a night.

After the visits started, the victim discovered an advertisement on the website Craigslist that contained photos Sayer had taken of her before they broke up in January 2006. The two had dated for nearly four years, according to court documents. The listing, under “Casual Encounters,” included step-by-step directions to her home and a list of sexual acts she would perform.

Because of the harassment, in May 2009, the victim legally changed her name and moved to Louisiana, according to court documents.

A few months later, the harassment began again.

The Maine State Police Computer Crimes Unit executed a search warrant on July 1, 2010 at Sayer’s home. Among the items seized were a desktop computer and a laptop computer where they found evidence linking Sayer to the crimes.

Sayer was previously convicted in state court of stalking the victim in June 2006 and violating a protection from abuse order involving her in February 2008.

The investigation was conducted by the Maine State Police Computer Crimes Unit, with assistance from the U.S. Secret Service.

— Staff Writer Dina Mendros contributed to this report. Senior Staff Writer Tammy Wells can be contacted at 324-4444 (local call in Sanford) or 282-1535, Ext. 327 or twells@journaltribune.com.