Authorities say the prime suspect in the murder of a Nashua elderly couple in their home earlier this summer killed himself while under police surveillance.
The Attorney General’s office and the Nashua Police Department say 37-year-old Shawn Burne lived next to William and Eleanor Grant.
A visiting nurse found the couple stabbed to death in their home on June 17.
Authorities say evidence quickly pointed to Burne as a suspect, including that he was in possession of some of the Grants’ property and that he had been in their homes after the murders.
Police say he was also untruthful during interviews with detectives.
As authorities kept Burne under surveillance, they discovered him in his home on June 26, dead from an apparent self-inflicted drug overdose.
Burne denied killing the Grants in his suicide note, but authorities say there is probable cause to indicate he did.
But because the evidence against Burne does not rise beyond a reasonable double, Nashua police are not closing the investigation into the murders.
No other suspects are being sought in the murders.