Still doesn't make sense. So people can be tracked in 2074, great.
The mob abducts someone and puts a potato sack on their head and stuffs them into the trunk. What does it matter after that if the person is sent back in time or incinerated or fed to pigs? The person was still abducted and taken somewhere. Or are they exploiting a loophole in the law and only being arrested for assault & abduction instead of murder?
Can't convict without evidence. Hiding the body is a time-honored way to avoid prosecution.