Absolutely. LR, an admitted gang leader, is the State's key to the hitman representation -- and especially since he's far removed from KM. LR owed KM nothing. Also, FBI/investigators were able to corroborate his details very early and deemed him credible as far as snitches go.
Talking to a US Marshal about this case, I learned that LR was a legacy member of the Latin Kings -- he was born into the organization, and essentially has known no other life. When he testified about going to the corner to buy a .38, that's exactly what he did! (CA wants to be LR)!
And LR turning on SG was a matter of survival in the coveted federal system where he's afforded the protection of frequently being rotated to different facilities across the country. SG long knew what came with his friendship with LR and no bad blood there. Some might even say he's looking out for SG in the Florida system from afar. (i.e., In a completely unrelated matter with similar circumstances, I know of a hotel that burned to the ground, destroying evidence that if found, would have greatly hurt somebody's homeboy).
IMO, SG was a party here for no other reason than KM, period.