Person of interest sought in slayings of retired New Hampshire couple go.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from go.com Daily Mail and Mail on Sunday newspapers.
"The Attorney General's office, the FBI, everybody is out there doing everything they can to figure out exactly what happened," Gov. Chris Sununu said.
The FBI has joined an investigation into the murders of an international humanitarian worker and his wife, both of who were discovered dead near a walking trail in New Hampshire.