She recovered her balance and wheeled around, intending to pursue the unknown offender.

Teten and Mullany designed a method for analyzing unknown offenders in unsolved cases.

In his profile, Dr. Brussel suggested that the unknown offender would be a heavy middle-aged man who was unmarried, but perhaps living with a sibling.

It should not be confused with profiling which grew out of the experience of police officers offering opinions to their colleagues about the possible characteristics of unknown offenders.

Teten, Mullany and Col. Robert K. Ressler employed their criminal investigative analysis technique to track down the unknown offender.

The unknown offender would be quiet and harmless in appearance, possibly middle-aged, and neatly attired, probably wearing a cloak to hide the bloody effects of his attacks out in the open.

He knew from their reactions that most of them knew he was getting at someone, and speculation regarding the identity of the unknown offenders was rife and served to keep their minds off the heat and hunger for several days.

BAU staff conduct detailed analyses of crimes for the purpose of providing one or more of the following services: crime analysis, investigative suggestions, profiles of unknown offenders, threat analysis, critical incident analysis, interview strategies, major case management, search warrant assistance, prosecutive and trial strategies, and expert testimony.