Cardinal Bengalli Thug escape artist.

My Bengalli is picking on all of my fish, he chases them and nips at them, he was going to be the only fish in a smaller size tank, but when i decided to get my own tank i ended up getting a larger tank and with that i wanted more fish. My tank is Aquascaped and most coral already in the places i want them. My husband and I  have been trying to catch him with no luck. Cornering, chasing, and during feedings. I am fresh out of ideas, my husband suggested a fish trap. We would like to either take a loaner on a trap or get some helpful advice on how to catch this mean little fish and get him out of my tank before he kills or stresses out my other fish. Any Help is very very appreciated! 

thank you! i will try that one.