It is very easy to change the date and time data in an image so clearly
the data and time will not be taken as proof as to when the photo was
taken. If the person who took the photo testifies they he did not alter
the time in the image then it would have about the same weight as any
other testimony a witness might make, the credibility of the
photographer would then be the issue.

I don't see how have the data and time on the image helps, since this
can also be added after the face.

Scott

Canon offer a forensic kit for their cameras which "may" be acceptable
in court but in general no, a time stamp does not have any legal
standing. This doesn't mean you can't convince a Judge the image is
evidence.

Photographs are an acceptable exhibit in court but any evidence
requires that you can prove a secure chain from taking to presenting
and by doing so, avoid any suggestion of tampering. Photographs are
very easily tampered with. The Canon kit is RAW file specific. I'd
imagine they (Canon) accept that image manipulation is common and
often undetectable.

Doug