evidence can become invalid becaue if it is cotaminated then you cant tell who commited the crime
So that it is not 'contaminated' by people other than the last person to have touched it.
To prevent the contamination of any evidence possibly left at the scene.
Trace fossil
LA Forensics - 2006 Preserved Evidence 1-6 was released on: USA: 5 May 2006
fossils
fossils
In criminal law there is something known as "the chain of evidence." If a computer is suspected of being involved, it is important that the computer (and by extension - anything contained on the drives) be preserved for recovery by technicians to be investigated and preserved for use by the prosecution. It is generally not necessary for a computer forensics technician to respond to the scene - it would be sufficient to take the computer into custody as evidence and securely store it in an evidence locker for later examination.
the corect answer is fossils
trace fossil
"Preserve" is both a verb and a noun. As a verb it means to keep from deteriorating. E.g. I preserved the evidence by putting it in an evidence bag. I preserved the fossil by covering it up. As a noun, it means a sauce made from preserved fruit. E.g. I served ice cream with a preserve for a dessert.
In case if it is contaminated
because they did