Quote:
Originally Posted by that_pope
Arguing with randoms about lineup construction on twitter.
Well if you're the suspect, you want to be on the right end of the lineup, from the perspective of the witness. Most witnesses approach a police lineup like they're reading a book; they go from left to right. Chances are they've picked who they want to burn for the crime before they get to the end. I mean... they came all the way down to the police station, missing the rerun of Barney Miller, so they're not going home empty-handed. What if they get to the end and it's
definitely not the guy?
However, being on the left end of the lineup isn't terrible, because a witness isn't going to blow their load on the first suspect. It would stand to reason that positions two and four would be almost as advantageous as one and five, with the middle being the worst, but conventional wisdom is often wrong. Three is too symmetrical, it looks like you weren't really looking at the suspects and picked the guy in the middle, so position three counter-intuitively just edges out two and four in terms of suspect favorability.
From the perspective of the police, trying to get a certain guy fingered, the above guidelines generally apply, with the caveat that you know (but the witness doesn't) where the floor has a slight hump , adding an extra inch to the height of a suspect, relative to the two guys next to him.
All things being equal, suspects will more likely identify the taller suspect. So let's say the high point of the floor is in position four. If you want Widow Chambers to say Jimmy No-Nose bludgeoned her for her social security check, place him in the fourth position with the two shortest guys next to him. Bam! Star witness.
There really isn't anything to argue about.