Kim Rossmo

Kim Rossmo is identified as a pioneer of geographic profiling and the person who coined the term. His role in the account is focused but consequential: a geographic profile he performed on the East Area Rapist’s Sacramento attacks placed a proposed anchor point close to one independently inferred by investigator Paul Holes, bringing two separate lines of spatial analysis into striking alignment.

Identity and Role

The book gives little biographical information about Rossmo, concentrating instead on his work as a geographic profiler. It calls him the father of modern geographic profiling and notes that he coined the term. His contribution enters the narrative after Michelle McNamara obtains his analysis of the Sacramento attacks, several years after Holes had already developed his own proposed anchor point without seeing Rossmo’s profile.

The Sacramento Profile

Rossmo’s geographic profile placed the East Area Rapist’s anchor point near the intersection of Coyle Avenue and Millburn Street. That location was less than half a mile northwest of Holes’s estimate, which centered near Dewey Drive and Madison Avenue, at the border between Carmichael and Fair Oaks. The close correspondence matters because the two estimates were developed independently: Holes had not seen Rossmo’s analysis when he arrived at his own proposed area.

The Geography Behind the Comparison

The profile concerns a series whose geography had become a central investigative question. The East Area Rapist repeatedly selected neighborhoods rather than simply isolated houses, often favoring single-story homes near greenbelts and conducting reconnaissance in the surrounding blocks. Reports also described drainage ditches and canals as recurring features of his movement through Sacramento. These details establish why the locations of attacks could be examined as a pattern; they do not establish that Rossmo’s profile used every such detail or reveal the precise method behind his calculation.

Holes’s estimate had its own supporting context. A 1995 FBI study found that, in a plurality of cases, the fifth attack in a series was closest to the offender’s home: 24 percent, compared with 18 percent for the first attack. In the East Area Rapist series, the fifth attack was second closest to Holes’s proposed anchor point, while attack seventeen was only about 300 feet closer. Rossmo’s nearby estimate thus joined an existing investigation into how attack locations might indicate an offender’s geographic center, rather than resolving the question by itself.

Significance and Limits

Rossmo’s profile is significant in the account less as a final identification than as independent corroboration of a small geographic area already proposed by Holes. Its proximity made the convergence notable, but the passage does not claim that either anchor point pinpointed the offender’s home or identified him. Rossmo’s appearance marks the point at which a specialized geographic analysis, obtained by McNamara, could be compared with Holes’s work and found to converge within less than half a mile.