The person spoke on condition of anonymity Sunday night because the move hadn't been announced.
Dallas fired Nieuwendyk on Sunday after four seasons with two coaches and no playoff appearances. The Stars finished their season 22-22-4 Saturday without earning a spot in the playoffs for the fifth season in a row.
Nill has helped the Detroit Red Wings extend their postseason streak to 22 straight appearances. He was Detroit's assistant general manager for 15 seasons and has worked for the franchise's front office since 1994.
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