STATE COLLEGE, Pa.—The attorney representing a man accused of having stabbed a man to death in an argument over about $20 worth of marijuana earlier this year is trying to get some of the evidence tossed out before his client's trial.

Twenty-one-year-old Tyler Marlatt of State College is charged in Centre County with first-, second- and third-degree murder as well as robbery and aggravated assault in the Jan. 16 slaying of slaying of 20-year-old Tyler Struble in Lemont.

Defense attorney Ed Blanik says his client acted in self-defense. He said in motions filed Monday that marijuana found in his client's apartment and text messages from his girlfriend should be excluded because they could prejudice jurors.

The trial is scheduled to start Nov. 5.