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The last thing they saw was someone they trusted.

You're tuned in to Hidden Killers with Tony Bruske.

Featuring retired FBI special agent and chief of the counterintelligence behavioral analysis program, Robin Dreek.

We are about to dive into the tangled web of the Delphi murder case, a story that has

confounded investigators rattled the public and left countless unanswered questions in

its wake.

Richard Allen convicted for the brutal murders of Liberty German and Abigail Williams,

now challenging his conviction with claims of ignored confessions,

shaky forensic evidence, and prosecutorial missteps.

With us as retired FBI special agent and chief of the counterintelligence behavioral analysis unit,

Robin Dreek, Robin, when you look at a case like this, one with conflicting timelines, potential

investigative oversights, and questions about the suspect's confessions, how does law enforcement

ensure objectivity when they are investigating something like this.

Well, ensure and objectivity, isn't that the great challenge?

Yeah.

But in everything we do as an investigator, and in every case, the first thing I'm always looking

for, as we talk about repeatedly together, is I'm looking for patterns of behavior.

...