CONCORD, N.H. — A New Hampshire jury has convicted a former baseball coach of molesting one of his players when the boy was between the ages of 10 and 12.

The Concord Monitor reported that Robert Joubert, 60, who coached in the Concord area and in York, Maine, was convicted in Merrimack Superior Court of three felony sex assault charges, including one count of aggravated sexual assault.

The player, now 21, testified that Joubert made him perform sexual acts. Joubert’s lawyers say they will appeal the convictions.

Joubert was convicted in federal court in November of possessing child pornography and sexually exploiting the same boy and other children. He was sentenced last month in U.S. District Court in Concord to 40 years in prison. The federal investigation began in 2012.

Joubert operated the Seacoast Baseball Academy on Route 1 in York from 2008 until July 2012, when he was arrested in Concord on multiple felony charges of sexual assault of boys – charges that date back to the 1980s.

In March 2012, York police, who initiated the investigation, said they received an email from the mother of an alleged victim warning them that Joubert was a “pedophile.”

Concord police and the FBI launched an investigation. According to police affidavits, one victim told officers that Joubert abused him in New Hampshire twice, once in 1984 and once in 1986, when he was 9 and 11 years old. A second victim told police Joubert abused him between 2001 and 2004, offering him a baseball glove in exchange for a sexual favor.