WORCESTER — A Feb. 4 trial date has been set for a Blackstone man charged with killing his 83-year-old father.

Glenn R. Armstrong, 49, is under indictment in Worcester Superior Court on first-degree murder and larceny of a motor vehicle charges arising from the Jan. 11, 2017, death of his father, Walter Armstrong, in the victim's home at 36 Summer St., Blackstone.

The trial date was set Friday by Judge Shannon Frison at the request of Mr. Armstrong's lawyer, David L. Larsen, and Assistant District Attorneys Joseph A. Simmons and Anthony H. Melia, who are prosecuting the case. Jury selection for the trial is scheduled to begin Jan. 31.

Mr. Armstrong allegedly stole his father's pickup truck after the killing and fled to Mount Laurel Township, New Jersey, where he was arrested the next day.

According to court records, the 83-year-old man's body was found on a bedroom floor in his home with a trash bag over his head and a belt securing the bag. State police investigators said they determined that his son's fingerprints were on the bag. 

The preliminary results of an autopsy showed that the elder Mr. Armstrong died as a result of homicidal violence, including blunt force trauma to the head and torso, and asphyxia by ligature strangulation, according to court records.

While court documents also indicate that the younger Mr. Armstrong suffers from schizophrenia, Mr. Larsen told Judge Frison Friday he did not know whether he would be raising a psychiatric defense to the charges against his client.

Mr. Armstrong remains in custody at Bridgewater State Hospital.

Judge Frison held a hearing Friday on a defense motion to suppress evidence in the case. The motion was based on a claim by Mr. Larsen that his client was unlawfully detained by police in Mount Laurel Township on Jan. 12, 2017, before the officers learned there was a warrant from Massachusetts for his arrest. Mr. Simmons contended the officers' actions were legally justified and asked the judge to deny the motion, which was taken under advisement.

Mr. Armstrong's case was continued to Sept. 10.