Ripon police say that a group of Canada and Greylag geese, and a Mute Swan, were shot through the wings and legs - and left to die.
They were discovered last month by an ecological survey team at a nature reserve.
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Callum Young, who will now be 23, was last seen on August 27 last year at his home in Hylton Road.
Gunner Paul Ferguson was on leave from the Army when he died in the early hours of Sunday August 21.
Dutch International Darryl Janmaat left for Watford, USA's DeAndre Yedlin arrived from Spurs and Tim Krul left for a season's loan at Ajax.