MURDERED: Jill & Julie Hansen

The gist

On November 15, 1986, in Willow Creek, California, 16-year-old twin sisters Jill and Julie Hansen were shot during a fire set in their family's double-wide trailer. Julie survived initially but died a month later from a medical accident. Police arrested their 21-year-old stepbrother Donnie Hansen, whose fingerprints were found on the murder weapon and whose car contained matching ammunition. However, Donnie's trial revealed significant investigative failures that cast reasonable doubt on his guilt.

Key takeaways

• The crime: Both sisters were shot at close range before a fire was intentionally set using gas cans. Jill died in the fire; Julie survived but died later from an air bubble in an IV line—ruled a rare medical accident.
• The evidence against Donnie: His palm print was found on the 12-gauge shotgun in fire extinguisher residue; unspent matching shells were in his car; he'd borrowed the shotgun days earlier for target shooting; he admitted to hiding the gun during the fire.
• Donnie's explanation: He claimed he hid the gun because he feared being framed for the shooting, and moved it after the fire thinking he'd be blamed. He passed a polygraph claiming innocence but failed two others during questioning.
• The prosecution's motive theory: Donnie wanted the family's $250,000 life insurance policy (doubling to $500,000 for accidental death) and had told an auto mechanic he expected to come into six figures soon for a Corvette deposit.
• Defense investigation holes: Police only tested one fingerprint on the gun, didn't check for other prints, failed to thoroughly investigate two teens seen near the fire (one uncle was the questioning deputy—a massive conflict of interest), and didn't pursue evidence of a tampered sliding glass door lock suggesting forced entry.
• The acquittal: After just six hours of deliberation, the jury found Donnie not guilty, citing poor investigation and the prosecution's failure to prove what actually happened in the trailer that night. Betty Hansen herself testified she didn't believe her son was capable of this crime.
• Remaining questions: If Donnie didn't do it, why would an intruder return the murder weapon to his car? Nothing was stolen from the house. The case remains officially unsolved with a $50,000 reward still active.
• Aftermath: Donnie changed his last name to his biological father's surname, severed all contact with Hans and Betty Hansen, and died in a car accident in Indiana in May 2025. Hans remains convinced Donnie is guilty; Betty has struggled more with this belief.

Notable quotes

• "There was flat out incompetence bordering on deliberate malfeasance" — Alan Chelsea, Donnie's attorney, on the investigation
• Hans's assessment of the key moment: "Donnie's reaction that night changed everything for him. From then on, he believed that Donnie had something to do with what happened."

Worth a full listen?

Listen to the full episode if you're interested in how police tunnel vision and investigative failures can lead to arresting the wrong person, or if you want to hear a detailed breakdown of circumstantial evidence that sounds damning but ultimately fails to prove guilt beyond reasonable doubt; the TLDR captures the essential facts and contradictions.