ROCKLAND — Michael Chasse, a Supermax inmate who discharged a homemade powder bomb and escaped from police custody during his trial last fall, was indicted by a Knox County grand jury Wednesday for tampering with a prison fire suppression system.

His case was among 49 indictments handed up Wednesday by the grand jury, which deliberated 2 1/2 days.

Chasse was among three Maine Correctional Institution inmates accused of aggravated criminal mischief in the damage to a sprinkler head and fire suppression system at the Supermax prison in nearby Warren. Chasse, 24, Charles Miles, 19, and James Jolly, 22, were accused of damaging the sprinkler system on various days in April.

Chasse was sentenced in April to 12 years in prison for attacking Robert Cohen during a robbery attempt in Cohen’s Brewer home two years ago. Cohen is the brother of U.S. Defense Secretary William Cohen.

During Chasse’s trial last fall, he discharged a homemade powder bomb outside a courthouse in Dover-Foxcroft and fled his police escorts. He was recaptured five hours later.

Other indictments Wednesday ranged from sex crimes to writing bad checks.

Three were kept secret until the accused can be arrested. There were no no-bills, which means there were no cases considered that did not result in indictments.

Indicted were:

Roy E. Barrett, 38, Rockland, two counts gross sexual assault using force.

Anoulak Phaene Phom, 28, Rockland, attempted gross sexual assault and unlawful sexual contact.

Conley Simmons, 70, Friendship, two counts unlawful sexual contact.

Matthew G. Yates, 19, Rockland, nine counts burglary, 10 counts theft.

Robert J. Lindsey Jr., 44, Rockland, three counts burglary, three counts theft, possession of firearm by a felon.

Christopher M. Brown, 18, Rockland, burglary, attempted unauthorized use of motor vehicle.

David A. Ames, 39, Matinicus, aggravated criminal mischief, assault, terrorizing.

Robert E. Sherman, 29, Union, criminal threatening with a dangerous weapon, terrorizing with a dangerous weapon, assault, violation of condition of release.

Michael P. Ugro, 33, Rockland, assault on an emergency care provider, assault.

David L. McMahan, 40, Owls Head, aggravated assault.

Shawn W. Pease, 28, Cushing, aggravated assault, terrorizing.

Randy L. Wall Jr., also known as Randy L. Wall-Withee, 21, Maine Correctional Institution inmate, two counts assault on a corrections officer, criminal mischief.

Terry L. Bolan, 40, Rockport, assault.

Dean A. Feltis, 32, Warren, assault on a police officer, criminal threatening with dangerous weapon, refusing to submit to arrest or detention, assault.

Robert L. Reed, 46, Rockland, assault.

William W. Colby, 32, Rockland, assault, criminal trespass.

Jorge Mendez Garcia, also known as Jorge Luis Garcia Mendez, 31, Lynn, Mass., eluding an officer, operating while under the influence, failure to stop for an officer, driving to endanger, operating after suspension, operating unregistered motor vehicle.

Michael Willings, 29, Supermax inmate, trafficking in prison contraband.

Robert J. Pedreira, 40, Thomaston, negotiating worthless instrument.

Bounkuang Souimaniphanh, 42, Rockland, negotiating worthless instrument.

Traci L. Cultrera, 33, Hope, theft, forgery.

Brandy L. Simmons, 20, Rockland, forgery.

Amy Gould, 28, Friendship, forgery, theft by deception, misuse of credit identification.

Bethany Hayward, 30, Rockland, theft.

Raymond R. Fournier, 45, Belfast, operating under the influence, operating beyond license restriction.

Christopher G. Watson, 23, Appleton, operating after revocation, operating under the influence.

John E. Barnes, 29, operating after revocation, operating under the influence.

Arthur Kee III, 38, Waldoboro, operating after revocation.

Don W. Richards, 40, Pittsfield, operating after revocation.

Jonathan J. Sevon, 25, Friendship, aggravated furnishing of marijuana.

Leatrice L. Marr, 57, Rockland, aggravated furnishing of marijuana to a child under 18.

Roy Barrett, 38, Rockland, aggravated furnishing of marijuana to a child under 18.

Debbie Pallitto, 40, trafficking in Vicadin.

Steven C. Libby, 30, Rockland, trafficking in marijuana. In a separate indictment, Libby was charged with receiving stolen property.

Danielle L. Reed, 21, Friendship, possession of a firearm by a felon.

Tonya L. Reed, 27, Rockland, theft.

April D. Rawley, 25, Cushing, assault.

Don W. Richards, 41, Pittsfield, operating after revocation.

Gary E. Weeks, 43, Searsmont, operating after revocation, theft.