Stupidity: After Vincent saw the photo of Alex's prescription bottle and pills, he asked what they were. Danny Mora replied, "Didn't match anything on our database so the lab's running chem tests... The lab's on it. We [police department] may not be fancy, Vincent, but we ain't dumb." The prescription bottle label would contain the drug's name and dispensing pharmacy. A quick call to the pharmacy would have given him the information that the lab would take much longer to provide. (00:48:28)
Stupidity: Alex, a contract killer, went to the hospital to kill a patient. After parking in the hospital garage, Alex put his car keys under the sun visor, risking the possibility that his car could be stolen. When Alex returned to his vehicle, the keys were not there. A professional or expert assassin should take precautions to assure his getaway car will be there and keep his keys on him. (00:01:45 - 00:04:30)
Stupidity: Dr. Meyers (paid $10 million by friend Davana Sealman) went into Alex's hospital room with the intent to kill him via an injection. Dr. Meyers was shown tapping on the barrel of the syringe followed by squirting out some (a lot) of the drug - a stream perhaps over one foot high. These things are done to protect the patient against air bubbles and receiving an excessive amount of the drug. The amount squirted out would have decreased the effectiveness and potential lethality of the injection. (01:36:05)