I was one just like you my two wives both were (still are) and I know all of us would have had the "common sense" (those two words again) and compassion to remove the brain matter before handing a piece of evidence back to a family member. The family is not the SOB whom took their own lives, they are the survivors that have to deal with it, they don't deserve the additional kick in the ass.
(I will keep going just to see if it's possible for you to stop )
You can keep being wrong all you like.