PRESQUE ISLE (AP) – A teenager convicted in the case of a dog that was stolen, killed and mutilated will remain in custody until he turns 21.

The sentencing of 17-year-old Joshua Dunn on Thursday brought to a close the final public chapter of a crime that the Presque Isle police chief described as “horrific.” Another teen, Benjamin Benedict, 16, also will be detained until he turns 21.

Both received the maximum penalty for a juvenile in Maine. A third teen who allegedly was involved has not been identified in court records.

Dunn and Benedict were accused in June of cutting, beating and stabbing to death a dog named “C.C.” after taking her from her owner’s yard.

The case sparked outrage across Maine and beyond, and phone calls, e-mails and faxes flooded the district attorney’s office.

The incident happened on June 2. Benedict told police that one of the teens untied the dog, then they took turns punching, kicking and stabbing the animal. Dunn, who admitted impaling the dog, was banned by the judge from ever having a pet.

Benedict told police was motivated by “accumulated rage” after a night of drinking but chose not to speak when the two teens pleaded guilty in July. For his part, Dunn told the judge he had some “built-up anxiety and needed to release it somewhere.”

At Dunn’s sentencing, Judge O’Mara told the youth that while he had done some “dumb, impulsive” things in the past, this crime crossed the line to “something truly terrible.”