WINCHENDON, Mass. (MyFoxBoston.com) -- Police released details of a necropsy performed on a family dog allegedly found hanging from a tree last month.

On the afternoon of April 14, Snoopy, a 14-week-old Beagle, was let out of his house while his owner, Allyson Clark, went inside to make dinner. After about 25 minutes, Clark's 10-year-old daughter went outside and found Snoopy hanging from a tree.

Clark said the dog was hung by his neck with rope from the family's bird feeder. The rope was wrapped around Snoopy's neck so tightly that it killed him, and the family had to cut the rope off after he was cut down from the tree.

"I don't know how somebody could ever do this to us," Clark said.

The necropsy, performed at Angell Animal Medical Center in Boston,  found that the dog died from "diffuse pulmonary edema," which can be caused by asphyxia, electrocution, congestive heart failure and anaphylaxis.