Lestrade entered the room. There was only a note left. His befriends bodies were taken to the morgue He never thought he's ever see Sherlock and John in the morgue for any other reason than a case. Now they are the case.
The detective bent down to pick up the note, he almost wish he hadn't when he read it. In red pen with Sherlock's delicate hand writing he read,
"We were just on a case that's all it was supposed to be..."