I'm not a tech-nerd, but tech-nerd expert witnesses say that an IP can be hijacked. I still think having the IP isn't enough to lay the predicate of authenticity, even with everything else I've mentioned. But I'm a criminal defense attorney, not a prosecutor or a judge.SJ, there is a hell of a lot of developing case law on IP addresses being admissible as criminal res ipsa loquitur evidence (which is a bit different than how it is used in civil cases). The internet and the law are always changing their relationship, but the case law is pretty clear that IP addresses are ipso facto evidence of posting, especially combined with a computer warrant search and log in information gained via warrant or subpoena.
Take federal prosecutions for possessing child pornography. The SOP is a federal agent interacts with someone online, receives child pornography from the person on a file-transfer site, then traces the person's IP. The feds don't file a case based only on the IP. They go to the person's house with a search warrant and find child pornography on his computer. Because of the nature of federal crimes, the person will usually find it in their best interest to confess and otherwise cooperate with the authorities. Now compare that emphasis with a state prosecution for doing a little flippy-floppy with a sporting girl and Barney Fife only having the reviewer's IP. There really is no comparison. Originally Posted by ShysterJon
Just saying that this is a rapidly changing area of law.