I don't know how active the Detroit Family still is or even if it still exists as such. From time to time there are a few mentions of bookmaking shakedowns or allegations of extortion of waste management companies and a few other crimes/businesses , including towing or real estate.

I don't think any of them would live in Detroit. From what I've read they long ago decamped to the Grosse Pointes or a few of the more working class suburbs like Warren, EastPointe, Sterling Heights, etc.

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.