What John Heinzelman has said about DNA evidence

2 quotes · 1 episode · Oct 3, 2026

John Heinzelman, Scottsdale Police Department detective who led the Feldman murder investigation, has been quoted on DNA evidence 2 times in 1 episode of 20/20, most recently on October 3, 2026. Each quote below is verbatim and links to the moment it was said.

In their words

  • Heinzelman described the PMH stain on the dining room floor as the item that stood out from everything else at the scene.

    “It was the sore thumb that sticks out amongst everything else”

    20/20: Home Alone (Oct 3, 2026) · Listen from 24:26

  • Heinzelman said the test of Ian Mitchum's retained blood sample was a full match to the PMH stain and all scene DNA.

    “This is a 100% match to our PMH, to all the DNA in the scene”

    20/20: Home Alone (Oct 3, 2026) · Listen from 52:27

Episodes

  • Home Alone

    20/20 · Oct 3, 2026 · 1 h 26 min

    John Quiñones reports on the 2015 murder of Allison Feldman in Scottsdale, solved through Arizona's first use of familial DNA and contested in court.

Others on DNA evidence

John Heinzelman on other topics