What is minimum number of pictures required for a photo array

A photo array is a display of photographs to a victim or witness of a crime.  

This method is used by the police workforce or authorities to find out or confirm the identity of a criminal suspect.

It's made up of at least Six (6) pictures of individuals, and among them, at least five filler pictures with one suspect.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov

answer placeholder because the system is messed up