Turvey differentiates between inductive and deductive criminal profiling. The former involves broad generalizations and/or statistical reasoning—a subjective approach in Turvey’s view. Turvey favors the deductive method of criminal profiling, in which the criminal profiler possesses an open mind; questions all assumptions, premises, and opinions put forth; and demands collaboration regardless of how distinguished the supplier of the input. Here, the emphasis is on the profiler’s objectivity, self-knowledge (to overcome transference distortions), and critical thinking skills—plus an ability to try to understand the needs being satisfied by each behavior of the offender as well as the offender’s patterns. Turvey places great emphasis on all forms of forensic analysis (e.g., wound analysis, blood stain pattern analysis, and bullet trajectory analysis), crime scene characteristics (including photos), victim and witness statements, and a thorough study of the characteristics of the victim—yes, the victim. He uses the crime scene characteristics to differentiate between modus operandi and "signature behaviors" (i.e., actions unique to the crime but not necessary to commit the crime), as well as to determine inferences about the offender’s state of mind at the time of the crime, his or her planning, level of skill, victim selection, fantasy, motivation, and degree of risk taken. Turvey labels his process behavioral evidence analysis and considers it objective because it is based on facts rather than averages and extrapolations from statistics. He acknowledges that criminal profiling is a skill rather than an art or science.