Murder and conspiracy charges have been dismissed against one of the two men accused of killing an 81-year-old Woonsocket woman in 2016.

Tyler Grenon, 24, who was Constance Gauthier’s neighbor, had been charged by the Woonsocket Police Department with first-degree murder and conspiracy in July. A spokeswoman for state Attorney General Peter Neronha said Monday that the charges against Grenon were dismissed, but could not immediately say why.

Collin Geiselman, listed as Grenon’s attorney, did not respond to requests for comment Monday.

Charges in Gauthier's stabbing death are still pending against Matthew Dusseault, of Woonsocket, according to Neronha's spokeswoman, Kristy dosReis. An indictment was filed in the case against Dusseault on Thursday, court records show.