For that to have any hope of working, you need easily available tools that can fake a chat database. Currently, I'm not aware of any such tools, and I'm not eve

For that to have any hope of working, you need easily available tools that can fake a chat database. Currently, I'm not aware of any such tools, and I'm not even sure that you can import a faked chat log into Signal on Apple iOS. In court none of that is likely to hold up anyway, as evidence like chat databases is pretty much assumed to be true until proven otherwise.