Answer:
The Land Ordinance of 1785 (laws passed by the Continental and Confederation Congresses are called ordinances) and the resulting North West Ordinance of 1787 are the most long lasting as they provided for the disposition of public lands and procedures for organizing territorial governments in the lands west of the Appalachian Mountains.
There's no exact list of things which one may 'require' but there are key pieces of information which can speed up the conviction.
1) A concrete witness is extremely helpful as it gives secondary view on what occurred. Multiple witnesses can also be helpful as a multitude of answers all of which are the same essentially gives said criminal no way to hide/defend themselves.
2)Evidence, yes this sounds quite obvious but there are different types of evidence. Photo evidence while useful can be tampered with so make sure what you have is legitimate and clear. Do not use photo evidence that does not portray what you are trying to explain poorly. Clarity is key. Video evidence is virtually the best thing to obtain. Security footage is helpful although as I said, clarity is key.