For this Achievement you want to go into the Hotel, talk to the receptionist to get a key for your room, go to your room (Top left) and sleep for the night. Once you are awake you want to go to the lobby and go to the bottom left to chat with the deputy, once chatting with them, they will tell you to drink some coffee, this is located at the receptionists desk. Drink this and head back to the Deputy. Once the chat is over you want to exit the Hotel, go out to the car park and hop in the Police car.This will transport you to the first crime scene. What you want to do is go around pushing enter on all the blood to collect blood samples. Once you have them all, go back out to the police car to be transported to the second crime scene and repeat, then return to the police car to be driven to the third and final crime scene. Once collecting all the blood samples here, the achievement will pop. You can now drink one of the blood samples to earn this achievement: