Look at the all the cases - what few there have been in recent years - and you'll see the D'Anna case was an anomaly more than anything. Corrupt local LE? Has the family also paid off the FBI and Justice Department? Growing more powerful?

What's left of the mob in Detroit is basically bookmaking with some loansharking and card games on the side. As well as whatever legitimate businesses they are involved in. The max estimate of made guys back in 2001 was 30 and over 20 members/possible members have died since then.