What John Heinzelman has said about Familial DNA searching

1 quote · 1 episode · Oct 3, 2026

John Heinzelman, Scottsdale Police Department detective who led the Feldman murder investigation, has been quoted on Familial DNA searching once 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 called Arizona's first use of familial DNA in the Feldman case groundbreaking.

    “Allison's case is the very first case in Arizona where familial DNA was used”

    20/20: Home Alone (Oct 3, 2026) · Listen from 47:59

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.

John Heinzelman on other topics