This was taken from the Alameda County District Attorney's Office publication "The Point of View"

In a murder trial, the defense attorney was cross-examining a pathologist. Here's what happened:

ATTORNEY: Before you signed the death certificate, had you
taken the pulse?

CORONER: No.

ATTORNEY: Did you listen to the heart?

CORONER: No.

ATTORNEY: Did you check for breathing?

CORONER: No.

ATTORNEY: So, when you signed the death certificate you weren't
sure the man was dead, were you?

CORONER: Well, let me put it this way.The man's brain was
sitting in a jar on my desk.But I guess it's possible
he could be out there practicing law somewhere.