[LoneRangerMassachusetts]

Looks like a calypso Louie follower. Bet the victim is white.

[calex59]

Police don't think they knew each other and a motive for the shooting has not been established.

Yeah, because the fact the shooter is a muslim isn't a clue./SAR

[PGalt]

Police don't think they knew each other and a motive for the shooting has not been established.

Then establish possible motives. As reason and logic points you to the real motive, the others will fall by the wayside. Most importantly, articulate the most likely motive based on all of the evidence.