Alex Sweny - you might remember the name. He headed the Heart of the City group in Auckland, got in trouble with money and the law and got sent to jail.
He did some good work in there, used his time well, was let out early and appeared on the telly last weekend to tell us jails are hopeless, they're run by gangs and we need to fix them.
I've met Alex I think twice. Once when he ran for mayor of Auckland and he brought me coffee and outlined his plan. And also at a charity event at the house of a doctor who had his own helicopter and helicopter garage on the property, and this was a property in the middle of town, thus leading me to think there is money in medicine.
Anyway, Alex is affable, effervescent and sadly of course the sort of person who should never have ended up in jail. Is he right about jail? Well he'd know.
A lot of us have a lot of views on jail, but most of us haven't been there. So should we be listening to him? Probably. But it's one thing to speak from experience, it's another to have the solution.