Trusted blood door and hallway

[Schwarze Pest]

Same problem happend to me.

Spoiler below!

I haven't seen that overturned desk so i hided in an corner of the room and the freaking enemy found me everytime ^^ So i just ran away from him to the door where i came from and leave the place. Then i waited 1 minute and went back and the enemy was like disappered and i could investigate all the rooms and grab the syringe and the alcohol.