#Does oxygen forensics work on ipods trial#
Eventually, valuable evidence could ultimately be dismissed, which then affects the entire criminal investigation and trial proceedings.įorensics experts will not examine and check for important DNA Evidence until they have initially found an appropriately identified blood sample. The results are worrying because a stain on clothing could be assumed to occur from something else when a test shows up negative for haemoglobin. On the other hand, even though there was some visible marking, luminol and phenolphthalein didn’t detect the haemoglobin on the clothing.
After the bleaching, stains did look faded, although they were still somewhat noticeable. To properly assess whether bleach could fully remove blood, researchers soaked some bloodstained clothing in oxygen bleach for a couple of hours. Not only that, but it can significantly compromise an investigation and may mean that Evidence is not properly investigated and used in a trial. As expected, this presents a unique challenge for forensic scientists. In these instances, haemoglobin is completely removed and can’t later be detected. With oxygen bleach, the bleach has an oxidising agent, which could be a substance such as hydrogen peroxide.
In fact, even if the shady criminal washed a bloodstained item of clothing 10 times, these chemicals could still reveal blood. There are bleaches that are primarily chlorine and there is also oxygen bleach.Ĭhlorine bleaches can remove a Bloodstain to the naked eye but fortunately, forensics experts can use the application of substances such as luminol or phenolphthalein to show that haemoglobin is present. To understand how it all works, you have to consider that there are two kinds of bleach that are found in the majority of cleaning products within your home. Unfortunately, even advanced Forensic Techniques can be challenged by the use of a common kind of bleach found in many homes. However, the evidence can become degraded from a number of things such as time, heat or the use of bleach. Most people know that forensics involves many different kinds of evidence, whether that is blood evidence or a weapon.
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