PEOPLE Explains: The Mystery of Who Massacred 8, Including a Family, on Fishing Boat in Alaska

It’s not a mystery how the Coulthurst family and a group of teenage deckhands were killed on their fishing boat, Investor, on Sept. 6, 1982, in the tiny southeast Alaskan fishing village of Craig.

What remains unknown, more than 35 years later, is who did it — and why.

“You never stop thinking about them,” says Dave Freeman, who grew up with Jerome Keown and Dave Moon, two of the massacre’s eight victims.

“The shock of losing everyone really tore up our town,” Freeman tells PEOPLE. “They all had their whole lives in front of them, and they were just blown away. It’s just such a shame and tragic for no reason.”

The slaying of skipper Mark Coulthurst and his pregnant wife, Irene, both 28, along with their children Kimberly, 5, and John, 4, and four deckhands — Chris Heyman, 18; and Keown, Moon and Mike Stewart, all 19 — is still Alaska’s

Read more at: http://people.com/crime/people-explains-investor-fishing-boat-murders-alaska/