Police are investigating if foul play was involved in the fatal mushroom poisoning which left three people dead and another fighting for their life.
Don, and Gail Patterson, and Ms Patterson’s sister, Heather Wilkinson, all died after consuming toxic mushrooms at lunch at a Leongatha home in July.
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The two Korumburra women aged 66 and 70 died in hospital on August 4, while Don, 70, died in hospital on August 6.
It has also left Ian Wilkinson, 68, Ms Wilkinson’s husband, fighting for life in hospital.
It’s understood the two couples believed they had fallen ill from gastro before being transferred to The Alfred Hospital where the toxins were discovered.
Homicide detectives raided a home in South Gippsland’s Leongatha on Saturday as part of their investigations.
A 48-year-old woman was interviewed and later released pending further investigations.
Police are waiting on a toxicology report to confirm the type of mushroom consumed.
One mushroom being considered by police is the Death Cap, which commonly grows in the South Gippsland region.
Death Cap mushrooms commonly range from 40 to 160mm in size, have a strong scent, and are pale green to yellow in colour.
The investigation surrounding the exact circumstances of the incident remains ongoing and police are liaising with the Department of Health in relation to the matter.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or to report confidentially log onto www.crimestoppersvic.com.au.