A person had filed two law suits and his thumb impressions look different in terms of length and width. The plaintiff is no more in this world.
1. How to authenticate thumb impressions of plaintiff? What are the legal formalities to be fulfilled?
2. How the uniqueness of thumb impression is determined; with some sophisticated computer scanners or under the magnifying glass with expert eyes?
3. May the amount of ink used interfere in comparison between two?
I look forward to your input.