ALFRED — A former Massachusetts state trooper is being held without bail after being convicted of gross sexual assault and two counts of aggravated assault by a York County jury Wednesday.

Joseph L. Silva, 55, of Newburyport, Mass., was convicted following a three-day trial, according to the York County District Attorney’s Office.

Silva was accused of arranging to have dinner with a woman in Portsmouth, N.H., then inviting her to his hotel room at the Roadway Inn in Kittery, ostensibly to watch a New England Patriots game. There, on Nov. 22, 2009, he raped and assaulted the woman.

The victim testified during the case, which was prosecuted by Assistant District Attorney Thaddeus West.

Justice William Broderick ordered the defendant to be held without bail at York County Jail until sentencing on Oct. 14.