The last time I flew a multi-engine,multi crew turbo prop, the"feather" of the "dead engine" manually was done by the pilot NOT flying after confirmation af the pilot Flying that he or she agrees that the correct( or shall I say"the dead")engine was identified before the pilot NOT flying feathers the engine( This procedure I would would like to believe is standard practice in all multi crew enviroments) whether it's a turbo prop or a jet, you DON'T just shut down systems( pull fuel handles or disconnnect generators etc) without the other party's( other pilots agreement with you on the situation) ! Just my humble 2 cents on this.
I think the crew did a very good job on this !! Wishing them all a speedy recovery,including the poor chap on the ground .