https://www.reuters.com/legal/government/la-is-investigating...
I think pocketing any unlockable crypto-wallets you found along the way would cross the line. You could stick them into civil forfeiture and use the resulting cash to upgrade your department-owned car though.
Breonna Taylor (2020) - Louisville, Kentucky: Police officers entered the wrong apartment using a no-knock warrant, which led to the fatal shooting of Breonna Taylor, an emergency medical technician.
Eurie Stamps Sr. (2011) - Framingham, Massachusetts: Police raided the wrong apartment, and during the operation, an officer's gun "accidentally discharged," killing Eurie Stamps Sr., a 68-year-old grandfather.
As many have mentioned above, civil forfeiture cases for carrying cash are rare, but devastating to people who are originally from countries/cultures that don't trust banks or police.
And of course "swatting" such as https://www.courthousenews.com/texas-woman-sentenced-for-swa...
I suspect anyone that was an early adopter of crypto is somewhat considered crime adjacent because so much of the early usage was silk road.
For a while after MtGox was hacked I used BTC-e (yes, I lost money in MtGox). It was later discovered(alleged?) that the operators of BTC-e were involved in laundering money for the MtGox hack[0]. I guess my very presence in that case would be considered crime adjacent.