You've never imagined having a gun to your kids' head, have you?
Read TFA. Specifically these paragraphs:
To his surprise, Adibelli agreed. “If you wanted out, why didn’t you let us know?” he said. Maertens was too scared to bring up the beating and the kidnapping and death threats. “Obviously, you know we’re not in a legal business,” Adibelli added. “So if you talk to anyone, we know where you and your family live.”
Adibelli brought Van De Moere down next and asked him if he wanted out, too. Van De Moere said yes.
There was only one condition of the release: Van De Moere had to give Okul an intensive training session on Linux, the operating system on which Metasploit, the hacking software, is based. A few weeks later, according to police and interviews, he did so over one weekend at a Holiday Inn in Ghent. In November, Van De Moere returned two antennas and had a couple of beers with Okul. That was the last either man would see of the Turks.
Something doesn't jive here. The type of people that are willing to actually hold a gun to your head are not the type of people that are willing to let you walk away simply by giving your notice. I don't doubt that there was some level of intimidation at play but there were apparently limits to how far the bad guys were willing to go. Which begs the question of why these two didn't go to the authorities after they "got out." Perhaps they didn't wish to part with the €25,000 in cash they had previously received?