AUBURN — A Port Byron man will likely serve two years in prison for trying to engage in oral sex with someone he believed to be younger than 15.

Richard McAllaster, 37, of 10518 Duck Lake Road, Port Byron, pleaded guilty Thursday in Cayuga County Court to one count of second-degree attempted criminal sex act, a class E felony. 

The person McAllaster connected with using an online dating app and thought was a 14-year-old boy was actually a member of the FBI, Judge Thomas Leone said in court. McAllaster tried to initiate "oral sexual conduct" in the Town of Brutus on May 17 with the FBI agent he thought was a child, Leone said.

In exchange for pleading guilty Thursday, McAllaster was promised a conditional sentence of two years in prison followed by five years post-release supervision. He faces a maximum sentence of four years in prison. 

His sentencing is scheduled for Sept. 12.

Also in court: 

• Dwight Williams, 40, of 7 Chestnut St., Auburn, pleaded guilty to three of 30 charges in an indictment that included multiple counts of first- and second-degree criminal contempt, as well as aggravated family offense.

An arrest warrant was issued for Williams on March 19 in connection to an incident on the same day, when a woman was choked in her sleep. The warrant charged Williams with first-degree criminal contempt, a class E felony, and obstruction of breathing, a class A misdemeanor. He was arrested by state police on March 29.

In court Thursday, Williams admitted to violating an order of protection by having contact with the woman on March 19 and by calling her on the phone on April 2. Williams also admitted causing $250 in damages to her car on March 22. 

He pleaded guilty to two counts of first-degree criminal contempt and aggravated family offense, all class E felonies. Leone promised Williams indeterminate sentences of two to four years in prison on each count, which will run concurrently to each other.

Williams will be sentenced Sept. 12.

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Staff writer Mary Catalfamo can be reached at (315) 282-2244 or mary.catalfamo@lee.net. Find her on Twitter @mrycatalfamo.