Letter from the FBI / About the semen *spoilers*

Subject: Result of examnation requested
identification analysis - DNA instrumental analyses

Examination requested by: Director Shin. Whasung Police Department
Reference: Letter dateed Octorber 21.1987
Examination requested: Chemical Analyses - DNA Instrumental analyses
Specimen: Q1 - Semen sample found in the victim's body
Q2 - Hair of suspect Hyun Kyu Park
Result of examination

List of position
__________________________________________________
position Q1 Q2 result
D398763 15/17 15/17 match
VWA 14/16 4/16 not match
FGA 25/26 16/26 match
D5S818 11/11 5/11 not match
D1S317 8/8 3/8 match
D7820 9/9 7/12 match
TH01TH0 9/9 3/11 not match
TPOXIDE 9/9 7/14 match
D28J980 8/8 5/5 not match
__________________________________________________

Since the DNA fingerprint of the suspect hyun kyu park does not correspond exactly to that semen sample found in the victim's body, it cannot be said conclusively that the suspect is the murderer. Specimen from e-1 to e-5 are returned herewith.


Director Clarence M. Kelly


(Yes, the typos are in the letter.)


I got a chance to rewatch this film and read some of the posts here. It bothered me when I read some posters who said the semen was not his. I'm not sure how they're coming to this conclusion when even the FBI could not conclude this. Nothing in the letter said that it was 100% one way or the other. It was just inconclusive.

I'm not sure if this changes the ending (for those who strongly believe it's not his). Personally, I think this makes the climax stronger. The detective is so damn sure it's him, and they've been waiting weeks for the final proof. After the the last murder and the fact that he could have prevented it, this letter broke his spirit. I can feel his frustration as he reads the letter and the moments after it.