"This confirmed Decker's initial suspicion that Helena's killer was a large man - strangulation is a very physical crime, and requires great strength. - Weignberg, page 76
Autopsies are essential to crime solving, it can determine how the person died and who was most likely to do such crime. I guess this brought my attention because of how fast they could determine a physical appearance on Helena's murderer. They were also very descriptive of what could have caused her death. It seemed like it was all done much more faster than with the fingerprint or the DNA. Nevertheless, even tough it is faster it is not as effective in a trial. People need more than autopsy to believe who was the murderer. But using DNA or fingerprint is less doubtful to prosecute someone.