Tinordi hit him with the shoulder, but followed through with his elbow, and the angle that that ref had probably made it look like he used his elbow.
There was no 4-person scrum. The Colgate player had the puck against the boards and Chase puts his stick on the back of his skates and the Colgate player falls. Sure, it was a weak call, but, the refs called pretty much anything and everything last night.
PS Major props to RPI|TV for shrinking the broadcast while the penalty clocks take up the two sides and putting up the penalty calls while they are being announced. The broadcast looks absolutely outstanding.
I'm not saying that the reffing wasn't bad last night (it definitely wasn't fantastic), but i'm going to give them the benefit of the doubt and not just assume that they're going to be terrible tonight.