[1] Construction of the composite was originally only performed by a trained artist, through drawing, sketching, or painting, in consultation with a witness or crime victim.
[citation needed] Feature-based systems essentially rely on the selection of individual features in isolation.
Such systems were originally mechanical, using drawings or photographs printed on transparent acetate sheets that could be superimposed on one another to produce the composite image.
A 2012 police field trial indicated that an EvoFIT directly led to the arrest of a suspect and then a conviction in 29% of cases.
The facial composite can contribute in law enforcement in a number of ways: Facial composites of various types have been used extensively in those television programs which aim to reconstruct major unsolved crimes with a view to gaining information from the members of the public, such as America's Most Wanted in the US and Crimewatch in the UK.