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Between 1987 and 1990, Jeffrey Dahmer’s crimes evolved from isolated acts into a sustained pattern of serial murder. During this period, he refined his methods, developing a system that involved luring victims, drugging them, and maintaining control over their bodies even after death. This phase marked a significant escalation in both frequency and brutality, as Dahmer became more confident and methodical in his approach. It also exposed systemic blind spots, as multiple disappearances occurred without being immediately connected.
Most murders took place inside Dahmer’s apartment, which he used as a controlled environment. Victims were drugged into unconsciousness before being strangled. Dahmer began preserving skulls and body parts during this time, creating a personal collection that reflected his growing obsession with control and permanence.
Police had several indirect encounters with Dahmer during this period, including reports from concerned neighbors and individuals who had escaped or suspected wrongdoing. However, these warnings did not result in decisive action, allowing Dahmer to continue his crimes.