Hah. Gallagher. You won't believe what he is up to now:Derringer had a very colourful past that sometimes he talks about. He used to be quite the substance abuser - coke, drugs, pot, booze, cigarettes - all of which he has admitted to on the air. He has even admitted to being high many times on the air (along with John Gallagher wherever the hell he is now).
Anyway, according to JD, he has put his druggie days behind him. He's married with 3 kids living out in the burbs somewhere round Stouffville or some god foresaken place like that.
http://www.classical963fm.com/personality/john-gallagher
As for being high while on the air, I know of another DJ on another well known station that is every day.