I've recently gotten the Dark Brotherhood DLC and twice I've now had a Black sacrament quest where one of the optional steps was to kill the target using poison. The first time I just used the Blade of Woe and did not fulfil the optional step, obviously. The second time I equipped a poison to my main weapon and attacked the target with it. I managed to kill him and got credit for the kill using poison. However, I got upped in the alert status and a bounty for being found trespassing.
Is there a way to fulfil the poison requirement without being detected/getting a bounty?
PC/EU (AD)