How would you differentiate between a screenshot of an email in gmail and a screenshot of an email in gmail where someone had inspected the source and changed the text before screenshotting?
Good point. If it was the only evidence and didn’t connect with anything else it would not be substantial proof. I would think it could add to a story but not be definitive proof? You are describing the defense against the screenshot which could be backed up by “expert” testimony. Here is something I found on e-mails being edited in outlook even: https://community.spiceworks.com/topic/1135234-can-i-protect... (questionable source)