Castillo states there will be no fingerprints found when he is at the crime scene of the present day victim but that would be incorrect because it's later shown that the killer uses his fingers with no gloves on to write the words in blood on the wall.
After the VA doctor refuses Crocket and Tubbs permission to interview his patients and they move to the parking lot, a reflection of the overhead boom mic can be seen in the Ferrari's windshield.