Private fire investigator shares next steps for Helix Apartments investigation

Investigators are still trying to find what caused the Helix Apartments fire that destroyed 90 units and displaced hundreds in St. Louis Park.

RELATED: Cause behind Helix Apartments fire remains unknown, final report expected next month

The fire happened July 17 at the Helix Apartments in St. Louis Park. The St. Louis Park Fire Department said its final report should be ready by the end of the month, while a team of private investigators is also working the case.

Lorne Brunner, a forensic fire investigator, said he plans to work through the building step by step. He said that process start...