Maine game wardens say they have identified four people who illegally killed four deer in April in Androscoggin and Franklin counties.

A six-month investigation showed that the deer were killed at night in open fields in Chesterville, Livermore Falls, Livermore and Leeds, said Cpl. John MacDonald, spokesman for the Maine Warden Service, in a press release. The poachers left the remains of the deer – including one that was pregnant with twin fawns – to decompose.

Two juveniles and two 19-year-old Fayette residents, Zachary Black and Kyle Elliott, was charged with hunting at night.

MacDonald said the investigation involved numerous night surveillance details.

Warden Dave Chabot, who led the investigation, said, “This case proved very detrimental to Maine’s deer herd in that area. The public once again worked with us and provided very helpful information.”