### Home > CCA2 > Chapter 12 > Lesson 12.1.3 > Problem 12-48

Governments and security companies are coming to rely more heavily on facial recognition software to locate persons of interest.

Consider a hypothetical situation. Suppose that facial recognition software can accurately identify a person

Make a model for this situation.

Use the model at right as a starting point.

Complete it by including the probabilities.*P*(suspect)^{1}/_{200,000, }*P*(ID is correct)*P*(not the suspect)?, *P*(ID is not correct)? If a person has been identified as the suspect, what is the probability that he or she is

*not*actually the suspect?The desired outcome is a person who is not the suspect being incorrectly identified, or situation D.

The possible outcomes are situation D and the suspect being correctly identified, or situation A.