Correct, CBS does own WKBD 50, and until last year was Detroit's CW affiliate, having previously been the UPN station pre WB merger.
Once Nexstar bought CW from CBS and Warner Bros. Discovery, WKBD dropped the affiliation and became an independent (as lot of CBS owned CW affiliates did post sale)
And as the topic of this thread is the 30th anniversary of the big network swap, let me tie it all together by pointing out that channel 50 was Detroit's Fox affiliate when the announcement was made, and after Fox migrated to WJBK TV 2, WKBD shortly thereafter became a charter UPN affiliate
Back in the day, WKBD aired The Ghoul, syndicating him from the aforementioned channel 61, and outside of Cleveland, Detroit was the Ghoul's most successful market after Kaiser syndicated him to all their stations in the early 70s.
Ronnie Duncan outside of his work on WOIO/WUAB, had a stint as morning host on WERE (still at 1300 then), and was the Cavs' P.A. announcer for a spell during the first LeBron era. He even briefly came back to 19/43 in the period right before the pandemic as a general assignment reporter.