PORTLAND, Maine — A federal jury on Tuesday found a Massachusetts man guilty of possession with intent to distribute heroin and crack cocaine, according to the U.S. attorney’s office.

The trial of Jean Valbrun, 27, of Mattapan, Massachusetts, began Monday before U.S. District Judge Jon Levy.

Jurors deliberated for about 90 minutes before delivering a verdict.

The judge ordered that Valbrun be held without bail until his sentencing, which has not yet been set, according to information filed on the court’s electronic case filing system. He had been free on $25,000 unsecured bail since June 2014.

Valbrun was arrested in March 2014 by Auburn police in his rental vehicle for an unspecified traffic violation, according to court documents.

During a search of the vehicle, law enforcement officers seized 225 grams, or nearly 8 ounces, of heroin and 106 grams, or 3.7 ounces, of crack cocaine from a vehicle driven by Valbrun, the U.S. attorney’s office said Tuesday in a press release.

Valbrun faces up to 20 years in prison and a fine of up to $1 million.