Do you think loved ones should see the body of another loved one?

if they have been in a bad accident? (only if they wish to see it and really want to?) My bro had to go to a car crash on friday (he is a firefighter) and the driver died. He was only 27 and just had a baby. The parents showed up at the accident and they were really upset and hollering out for their son but my brother said they had to hurry and put their sons body in the body bag before they showed up.