At 7:15 of the second period in the Red Wings/Panthers game, Detroit requested a Coach's Challenge to review whether Aleksander Barkov interfered with Detroit's Jimmy Howard before Jonathan Huberdeau's goal.
After reviewing all available replays and consulting with NHL Hockey Operations staff, the Referee determined that Barkov interfered with Howard before the puck crossed the goal line. According to Rule 78.7, "The standard for overturning the call in the event of a 'GOAL' call on the ice is that the Referee, after reviewing any and all available replays and consulting with the Toronto Video Room, determines that the goal should have been disallowed due to 'Interference on the Goalkeeper,' as described in Rules 69.1, 69.3 and 69.4."
Therefore the original call is overturned - no goal Florida Panthers.
Since the Coach's Challenge resulted in the original call being overturned, the Detroit Red Wings retain their time-out.