Killer Heart To Hearts

Hosted by real-life couple William Cannon and Elise Buedel, Killer Heart to Hearts isn’t just another true crime podcast. It’s immersive, sharply written, and emotionally honest. With a tone that’s darkly witty, culturally aware, and often chilling, each episode dissects stories of murder, disappearance, and betrayal — always with a human heartbeat beneath the horror.

Whether it’s the psychology of an incel, the mystery of a locked hotel room, or a murder staged to look like a suicide, we dive into the shadows — and bring our listeners with us.

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Killer Heart To Hearts

70. Firebug

March 02, 2026 • Elise Buedel & William Cannon

0:00 | 1:17:27

An heiress from Duluth.

A trail of fires stretching from Minnesota to the Mexican border.

And a quiet little mining town in Arizona… that never saw her coming.

Marjorie Congdon Caldwell Hagen carried wealth, suspicion, and misery wherever she went.

Her tale is part true crime… and part ghost story that still haunts this desert town.

For this special episode, we’re going local, and recording live from ground zero — Ajo, AZ, AND we’re teaming up with Z89.3 KZAO’s own Bo Johnson to tell the story of Marjorie Hagen — the “Black Widow of Ajo.”

Source Material:

MN Historical Society (MNopedia)

Glensheen (UMD) official blog: “Women of Glensheen”

Duluth News Tribune (feature): “Glensheen murders still intrigue”

MPR News (feature, with photos/audio): “40 years later, Glensheen murders still grip Duluth”

Minnesota Supreme Court (primary): State v. Caldwell (1982)

Duluth News Tribune (feature)

Brainerd Dispatch (AP report): DNA on key envelope (2003)

MPR Archive (2003)

Los Angeles Times (obituary/recap): Roger Caldwell’s suicide

Duluth News Tribune (30-year look-back)

Washington Post (1992)