If you don't care too much about going astray from the storyline of crusade you could use Bester as the bad guy.
Something to Bureau 13: The made use of the Lazarus Project.
The former leader of Free Mars, Able Horn, was shot down in his ship in orbit of mars (I think during the food roits) and was as good as dead.
They inserted a computer into his head, fixed him telepatically on the moment of his death (the only though in his head, thats runnin in a loop) and gave him an artificial hand with which he could access computers (via the crystal slot) and deliver deadly electric shocks.
Before Talia Winters reactivated his real personality, he was more like a robot than a human.
When he finnaly was shot, his body selfdestructed, leaving no trace behind.
Andd the female PSI Cop supervising that Operation was officially declared deceased years before.
And thus this thread contains all that is known about Bureau 13 AFAIK