(Here is an example of some of the NamUs file comparisons I've been working on).
Based on the UIDLI's NamUs file information, one of the Missing Persons searches I've entered yielded four results.
The parameters were: current age = 18 - 40; male; Hispanic / Latino; date of last contact = before 17 November 2017; state = New York. (I give some space for d.o.l.c.; I omit height and weight here, in case of significant lapse between dolc and found; hair colour for same reason, because this can easily be changed).
The four results are:
1. Steven Sanchez -- (no image available for comparison); current age 31; missing from Buffalo since 26 december 2016.
The National Missing and Unidentified Persons System (NamUs)
2. Yoxy Zuniga Romero -- missing from Yonkers since 25 December 2016; current age 19.
The National Missing and Unidentified Persons System (NamUs)
3. Erol Melendez -- missing from Dobbs Ferry since 22 December 2016; current age 20.
The National Missing and Unidentified Persons System (NamUs)
4. German Crisoforo Rosales Salinas -- missing from Mamaroneck since 27 November 2008; current age 40.
The National Missing and Unidentified Persons System (NamUs)
According to the three facial comparison programs I have at hand (excluding search result 1): The highest percentage of similarity is person 3 -- according to all three programs and as an overall average; two programs reached percentages near possibility of same person but still fell short. The second highest percentage of similarity was person 2, in all three programs and overall average.
Issues with the comparisons include: date of photos is not always known (differences in age may alter results); differing angles might yield relative inaccuracies; some images are of such a quality as to be found unreadable by one or more programs.
{As a side note: I find it interesting that three of these four persons are missing since a similar date in November (the fourth person missing in december, which is relatively close -- albeit several years before the other individuals), and that three of the four individuals are missing from Westchester County. Two of these persons share both similar dates and the same county.}
[Edit: attempted to reword last paragraph for clarity]