as long as after the wacking, u bring them straight to the balai, do not hold them any longer ... and to put urself in a beeter position, try not use and weapons or tools to wack them la, try something which is already there at the scene, like sticks, bricks ...
i kena once, when i hold the mofo too long ... at the end had to let him go, coz i detain the fella to long while waiting for my police friend to come over, i hold him for more than 6 hours ... as if i go and brig him to the police stationn after 6 hours - i might be charged with illegal detention or worst kidnap ...
so after the wacking session, just drop him at the police station ...