Ex-teacher is Russia's prolific hacker

Alla Witte's plans for a new career as a computer programmer included helping clients make enough money to see the world. The Russian was in her late 40s with a degree in applied mathematics and an itch to do computer programming.

But there was a darker side to her interest in computers. In the six years leading to October 2018, Witte allegedly transformed from amateur developer to a key cog in a cybercrime syndicate known as Trickbot.