Are sequential lineups more effective than simultaneous?  One study says no. 

A Policy Evaluation of Simultaneous and Sequential Lineups

NIJ Journal October 2007 Police Lineups: Making Eyewitness Identification More Reliable

Police Lineups:Making Eyewitness Identification More Reliable

American Psychologist June 2000 From the Lab to the Police Station

This is an article about how psychological research into eyewitness memory and identification can be applied in criminal investigations.

From the Lab to the Police Station

Eyewitness Memory for People and Events

Gary Wells and Elizabeth Loftus review how memories and events can be altered intentionally and  unintentionally.  From this information they recommend best practices in obtaining  accurate information.

Eyewitness Memory for People and Events

Eyewitness Evidence A Guide for Law Enforcement

In 1999 the Department of Justice created a technical working group to create a guide for law enforcement to promote accuracy in eyewitness evidence.

Eyewitness Evidence A Guide for Law Enforcement