(NewsNation) — A filmmaker working on a documentary about the unsolved murders of five women at a Lane Bryant store in suburban Chicago is urging police to try something different.

“It’s been 17 and a half years — maybe change your strategy a little bit. It’s an absolute travesty that this is unsolved,” Charlie Minn told “Banfield” on Thursday.

Authorities have not reported any recent breaks in the cold case, long after releasing sketches of the gunman and garbled audio of the killer’s voice that is heard on a 911 recording made when one of the victims called for help.

How the killings unfolded at Lane Bryant store

On Feb. 2, 2008, a man posing as a delivery driver entered the Tinley Park store and pulled a gun on six women, forcing them into a back room. The gunman shot all six, but o

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