The New Orleans native joined COC when they were a fixture in the New York hardcore scene and he says the "slippery, greasy" guitar sound of his hometown made the band more punk rock than they had ever been.

Keenan features in episode five of NOLA: Life, Death & Heavy Blues From The Bayou - a series investigating the city's heavy metal scene. He was snapped up by COC in 1989 after making his name with New Orleans group Graveyard Rodeo.

He says: "COC were looking for a singer and that was a huge turn in my life. I had the opportunity and I ran with it. The New Orleans guitar playing style I had learned from Graveyard Rodeo came in handy when I jumped into that.

"When we wrote a song called Albatross, COC was so ingrained in the New York hardcore scene, playing a Sunday matinee at CBGB's and sh*t. We wrote Albatross and we though these motherf***ers were going to kill us.

"I felt more punk rock writing that sh*t from the world we were in, I felt like we were really putting our dick on the chopping block. That was the turning point for me. When I could get to the point that you were pissing off your own scene, it made you feel alive."