Fokin's case is notable partly for its concealment strategy: he deliberately selected victims — homeless women, alcoholics, prostitutes — whom he calculated no one would report missing, and the evidence bore him out, as none of his ten known victims were ever formally identified. Operating out of his Novosibirsk apartment across roughly four years, he used the same location and method of disposal each time, a consistency that ultimately made physical evidence traceable once a single bag of remains was reported. He was in his sixties when arrested, having begun the killings in his early sixties — a demographic detail that drew particular attention from Russian investigators and media.

His criminal record stretched across two decades, encompassing rape, robbery, poisoning, and three killings carried out with patience and deliberate manipulation of his victims' trust. What distinguishes Haddouche in the record of French serial violence is the method: he consistently used pharmaceutical agents to incapacitate, moved carefully to establish false alibis, and leveraged personal relationships as instruments of concealment. The span of his offenses — from 1992 to 2002 — reflects not impulsive violence but sustained and adaptive predation across an extended period of apparent normalcy.

His transient lifestyle made him both prolific and difficult to track — moving constantly across the country allowed his crimes to accumulate over more than a decade before he was apprehended. The uncertainty around his actual victim count reflects how effectively geographic mobility could obscure patterns of violence from law enforcement in that era.