The last one to leave the asylum is a rotten egg

Dr. Laslo Martin came to the facility with the best of references.
But his solution to everything was a lobotomy.
They complained to the state until they ordered an investigation.
Dr. Martin caught word of it, and the next day, he had the other doctors lobotomize him.
About an hour after the procedure, everyone began to get sick.
Patients. Doctors. Nurses. Staff. Guards.
Everyone was vomiting blood.
Dr. Martin had poisoned the day’s meals in facility’s cafeteria.
When the investigators arrived, slipping on the foulness on the floor, they found him blankly standing by a window, whispering incomprehensible meaningless mumbles.