When Delko is driving the tow truck, he has his over head lights on. At one point the lights are modern day strobe lights, the next scene they are revolving lights.
When the victim is being autopsied, the radio in the back ground announces that the Clintons had arrived in London to attend the funeral of Princess Diana...only Mrs. Clinton attended the funeral, not both.
In the flashback where Eric Delko is driving the tow truck you can see that the tow truck's ignition key is in the off position.
At the start there are tracking dogs in the water looking for Delko. Dogs can't track in water.
In the opening sequence, the Crown Victoria Caine and Sullivan arrive at the crime scene is a style Ford did not introduce until 1998.