I have not heard of Tech Hockey Guide before but it seems credible after a brief review of its twitter and the site itself. They have news:

Bill Muckalt is no longer in the running for the @mtuhky opening. He will rejoin Mel Pearson at @umichhockey. #mtuhky #FollowTheHuskes

— Tech Hockey Guide (@TechHockeyGuide) May 27, 2017

Michigan Hockey News also reported Muckalt's departure from the Tri-City Storm, so 1) he's taking a new job and 2) the Tech people say it's not at Tech. That's solid.

Muckalt was Pearson's first hire when he got to Houghton and he's getting the band back together at Michigan. Given the results the first time that's probably good news. Muckalt was upwardly mobile in the hockey coaching ranks after departing Tech, landing a job as a USHL head coach/GM, and should bring recruiting chops. Tech Hockey Guide credits him for finding some gems in the rough in his tenure there; when Pearson hired Muckalt at Tech his ability to make it rain recruits was a major factor:

“I always admired his tenacity, his work ethic, his character; with his background it was a no-brainer hire for me,” Pearson said.

Pearson also eyed Muckalt for his own recruiting skills. “He’s such an out-going guy. You need someone who is personable and not afraid to go out on the road and work hard.”

If Steve Shields sticks around as the goalie coach—and given the results Michigan should be working overtime to make that happen—that would complete Pearson's staff.