Steve tells Mark to get Leo out of his crime scene. Steve works for the LAPD and the crime scene was outside the city, as indicated by the presence of the LA County Sheriff vehicles. Steve would have no jurisdiction at the crime scene.
When checking the background of the victim, Steve says "NCIC ran her". The NCIC is the National Crime Information Center. It is a database, not a law enforcement agency. Law enforcement agencies run people through the NCIC, but the NCIC does not run people.
In the bar when Steve, Mark, and Leo confront Hansen, Sgt. Baker calls Hansen "soldier" twice. Marines are not referred to as soldiers other than by someone with no military experience (the term soldier is used only for Army personnel). A Marine Drill Sergeant would not make this type of mistake.
After Dr. Sloan agrees to meet Vicki at his house an exterior shot shows the sun low in the sky to show it's evening time. But when Sloan goes outside to talk to Vicki the sun is high overhead, as if it's suddenly noon time.
When Dr.Sloan rushed over to look through his scope to see what Vicky was yelling at on the beach, the image he saw was clearly seen, however, the scope did not have a cover on the lens. The sea air would create such a film on the lens that nothing would be seen clearly.