maybe it belonged to the defense?

In a murder trial, the defense attorney was cross-examining the coroner.

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.