A former American prosecutor who specialized in murder cases without a corpse weighs in on whether Winnipeg police should spare no expense to excavate a landfill and search for Tanya Nepinak.

Nepinak, 31, went missing in September 2011. Police believe she was slain by Shawn Lamb, who is also accused of killing two other women within the past year.

Her family says police have told them her remains are likely buried in the city dump.

Winnipeg police have not said if they will scour the dump for Nepinak's body.

According to Vernon Mann, the father of Nepinak's two children, police told him a search would cost between $500,000 and $1 million and there would be a less than one per cent chance of finding anything.