Savage at Crime Scene

The first thing I noticed is obviously the way he drove into the crime scene.  He barrelled right into the driveway, and nearly hit the two other detectives that were already there.  He could have also ran over some substancial evidence that may have been on the ground, hence the reason there were cones there.

He seemed to have a very laid back attitude about the whole investigation, dismissing the sargent from the scene and saying he was going to re-trace the whole incident. He did not do fingerprinting properly and was waving the finger printing materials in his assistant's face, which is unsanitary.
Upon entering the bathroom, he proceeds to wipe off blood smears that appear on the mirror instead of documenting them as evidence and having them tested.  When a bag of heroin was discovered in the kitchen, instead of taking it in for testing, he dips his finger in it to taste it, thus destroying evidence.    When it came time to treating the media, he was very impolite and did not handle the conference in a professional manner at all.

While this is an obvious exaderation of a real investigation, I do feel like this could actually happen because some police officers are careless, ignorant, or they just honestly don't know.  Falsyfing evidence is very popular, and commonly done accidentally.  However some police officers will on purposly falsify evidence to cover for another officer or someone they know.  What should be done to prevent these instances is more education about the importance of evidence and honestly collecting it.  Officers should be made accountable for their actions if they do something that falsifies the evidence or if they fail to document it.