The 2/11/13 Bones episode titled "The Shot in the Dark" was a unique one. I seriously doubt that frozen blood bullets will soon become the wave of weaponry any time soon.
However, there was a statement in the episode that struck a cord with me. It was stated that 'they never test the blood in a pool near the body'. Unfortunately this is often truer than not. The rule of thumb at crime scene is, or at least should be: when in doubt, collect it. It goes along with the theme that it is always better to have it and not need it than to need it but not have it.
Investigation theories may take several twists and turns during the investigation and what could be considered evidence at one point in time may not necessarily be pivotal but something taken on a second thought may actually be one of the most important pieces of information that makes or breaks a case.
Over the many years of bloodstain analysis, unfortunately I have inherited several cases that initially were simply considered a suicide but years later more information pointed toward a potential homicide. If all cases were worked as if they were a homicide to begin with and all possible evidence collected initially then there is no harm, no foul. However, if the crime scene investigator becomes tunnel visioned and does the bare minimum because it is just considered a suicide...well you can see the potential problems.
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