But what "additional evidence"? They enough evidence to link the ip address to a serious felony. If you lend someone your car, and they try to drive it across the border with 20kg of cocaine, expect them to come crashing through your door.
The last time I looked, my car wasn't much like a computer connected to the internet. Since they're going to claim technical expertise in the warrant ....
In any event, I was addressing the assumption that quick action is required as soon as the police know an IP address. It isn't.
As to the additional evidence, some indication that it was actually received at the guy's computer. After all, I'm pretty sure that the police don't raid the post office.
