I saw Decius "bro ruling" roh, as in not attacking him when it was like a 7v1, but as guarding him or blocking his teammates I didn't see that.
The closest thing I saw as far as what everyone else is saying was when they were on the same team and Decius was baiting people around a corner were roh had a swing chambered. That is obviously not against the rules, but is just teamwork.