After they get it when they are authorized to get it. You cannot point at random things and call them evidence. For instance, I can take a dump and flush it, despite law enforcement's assertion that my stool is evidence in some imaginary crime.
It doesn’t have to be something the police have already collected. It could be something that they have yet to collect.
The textbook tampering with evidence example is: drug dealer tries to flush the drugs when the police knock on the door.
It doesn’t have to be something the police have already collected. It could be something that they have yet to collect.
The textbook tampering with evidence example is: drug dealer tries to flush the drugs when the police knock on the door.