The main biker gangs (one-percenters or outlaw bikers) in Alberta in the 1970’s were the Rebels MC and the Grim Reapers MC. Rebels MC later disbanded in the late 90’s and the Grim Reapers MC patched over to become a Hells Angels chapter. That’s often how the larger 1%-er clubs like Hells Angels MC or Bandidos MC expand, by absorbing local clubs into their own organisations.
(Hells Angels MC and Rock Machine MC fought a bloody war in eastern Canada in the late 90’s.)
In my opinion, there are two factors that could indicate biker involvement.
The first is where his body was found, in my opinion it was well hidden and not meant to be found. Where I work, we have a number of bikers who have disappeared and are presumed murdered because of internal conflicts in their clubs. Sam’s case reminds me of this.
The second factor is his injuries, it’s massive overkill. This indicates either punishment or being tortured for information or a confession.
So, this leads to two hypotheses:
1. Sam was associated with a biker gang and was killed in an internal conflict between him and the gang. The violence would then be punishment.
2. Sam was associated with a biker gang and was acting as an informant to law enforcement, was found out and killed. The violence would then be to extract information from him.
But in both cases he would probably be known to law enforcement, especially if he was an informant. His handler would know if he didn’t check in or kept in touch. So why would he stay unidentified for so long?