I have to admit, it was better than I expected!
Graphics: 8/10. A little dark and blurry at times, but you did the best you could with size limitations, so it's fine. Surprised you could get five+ minutes of video into 19 megs with quality this good. The intro was nice, too...seemed like a "real" movie/television program intro scene, heh.
Audio: 8/10. Voices were a little hard to understand at times, but nothing drastic. The narration did a good job of being somber and serious...until the anal fissure cream massacre was brought up. XD
Acting: 10/10. Perfectly fit into the faux-serious storyline, with the distraught and weary detective, and the gunfight was awesomely hilarious. As was the celebration over tostitos.
Humor: 10/10. Totally started out as a serious cop story, with everything deadly serious, until the mention of anal fissures cream. One wonders why the entire family had them, Mister Detective. XD The gunfight was the highlight of the movie, with the bangs and bams being absolutely hilarious, as was their aggravated interruption. Well done.
Overall presentation: 10/10. I've never been a fan of live action stuff on Newgrounds, but this was an exception. You managed to cram a lot of goodness into 19 megs without sacrificing much video or audio quality, along with a humorous story that was fun to watch. Good job.
Ways to improve: I can't really think of much, since this flash appears to have been filesize optimized well and the storyline was perfect as it was. Perhaps, as others have mentioned, the lighting could have been a bit better, since dark scenes coupled with the slight distortion of filesize cramming can make viewing difficult at times.