That's why I got out. He has frequently called for forensic scientists to be paid for by the court, rather than by the defence or prosecution. I have always been an imbecile on financial matters,' he says. Born in London of a Turkish family, he had enough money not to worry about it. His wife manages all their finances - and enjoys the role.
Plans are in place to fund education for their three young children.
The oldest is 15, so there is still some time to go before university. Now 49, Dr Zak may profess to be useless at finances, but he can still discuss the issues with the clarity you would expect of a well-known scientist. It's sad seeing people who don't have much money religiously buying these wretched things each week and thinking they are going to get rich.