Ok I have recently started a new DH campaign and for a change we actually have a psyker in the group. Now the player in question prefers combat over investigation so has taken telepathy so he can speed up the investigation by implanting the thought "you will tell me what I want to know" which as per RAW the npc's get no defence against. Now this has come very close to de-railing the current investigation campaign that I'm running, so something needs to be done - but I don't want to be too heavy handed.
Anyone else had similar problems, or got any suggestions on a solution?
Regards
Surak