PORTLAND — Shawn Garland, the man accused of stabbing another man to death in a Grant Street apartment this summer, entered a plea of not guilty in Cumberland County Superior Court today.

Garland is accused of killing Richard Meyers, 58, on Aug. 12.

Garland has requested a jury trial, which was tentatively scheduled for next September. He is being held in Cumberland County Jail in lieu of bail pending the trial.

Garland’s lawyer has said the 25-year-old murder suspect has a long history of mental illness, which may have played a role in Meyers’ stabbing death.