After Kono calls the rest of the team out of the interrogation room and they go into the hall, the door slams shut. After a camera change, we see Kono talking and the door is moving back and forth slightly.
Not only is the photo processing process very much shortened, but this effectively makes the "big reveal" moment unrealistic. Between seeing the image by looking at the negatives themselves through to seeing the image projected in the enlarger, developing test strips, etc, the characters would have seen the damning image long before the finished print would have been developed as seen in the show.
While developing a picture from a 35mm roll of film, the characters point to a date stamp on the film for a date in 1989. Date stamps were not available on 35mm film in frame. Date stamps for 35mm film frames were printed on the back of prints in ink, not within the picture.
When Jerry develops the photos from the roll of 25-year-old 35mm film, there is a date-stamp on the print. "Data Backs" were available as optional - and expensive - extras for some high-specification cameras, but consumer-level cameras did not have this facility.
In the yearbook photo of Chin Ho Kelly playing a trumpet in the high school band room, the adjacent clarinetist is taking in too much mouthpiece, has mispositioned her ligature, and has incorrectly placed her right hand on top instead of the left, and with both hands not covering tone holes and appropriate keys.