https://www.mercurynews.com/2021/06/24/disappearance-of-contra-costa-hells-angel-part-of-fbi-investigation-feds-allege-one-of-three-missing-members-was-murdered-cremated/

In what has become a recurring theme in the ongoing prosecution of 11 Hells Angels members, court records reveal that the FBI investigated the still-unsolved disappearance of a Northern California man as part of a massive investigation into the outlaw biker club.

The 2016 disappearance of longtime Contra Costa County resident Art Carasis, 66, is now the third such missing persons case that authorities have acknowledged they investigated before obtaining a racketeering indictment against 11 Hells Angels in 2017. The other two are Robbie Huff, 34, of Fresno, and Joel Silva, a Sonoma County resident believed to have been shot and killed in 2014.