The prime suspect in the infamous Tyong North and Frankston murders has declared his innocence.

On the same day, police offered a $6 million reward for information leading to an arrest.

The elderly man broke a decades-long silence to tell seven news he's not the serial killer who took the lives of six women.

Jodie Lee has our report.

Unknown to one another during their lives, these six women are forever connected.

They're bound by the violent circumstances in which they were murdered

and police say by the man who killed them.

The task forces and the original homicide investigation have certainly indicated that

those six cases are leaked.

But this morning the man who's been the prime suspect since the 1980s again protested his innocence.

I never ever, I didn't know those people. I never saw those people

and I never thought of murdering. I didn't have, I was too busy working, long hours.

Harold Janman is just one of almost 2,000 people interviewed in relation to the Taingong North murders.

But the 85-year-old could soon find himself being questioned again.

Today, police announced they're starting the investigation from scratch, with no suspect ruled out.

They joined with victims' families to offer a $6 million reward

for information that could find one man responsible

for all six murders. This is the largest amount of money ever been offered in relation to a

single investigation. The first body was found in 1980 at Frankston and identified as 59-year-old

Alison Rook. Months later, teenagers Catherine Headland and Anne-Marie Sargent

and 73-year-old Bertha Miller were found dumped near a quarry at Tyong North.

The following year, 55-year-old Joy Carmel Summers was found in Scrubland at Frankston North.

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