A $500,000 reward has been posted over the wrong-victim arson death of Katie Tangey at Truganina in Melbourne’s west.

Brie Eyre and John Rowe worked two full-time jobs, saved for years and lived with their family to afford their first house – and they still couldn’t find a place after two years of searching.

Following the incident, security arrangements at the private hospital have also come under scrutiny, with the Patna Police ...