BURLINGTON, Ky. — New evidence has granted a retrial in the case of a janitor serving life behind bars in Kentucky for the murder of his co-worker at a biotech company.

Media outlets report that Judge J.R. Schrand on Friday ordered a new trial for 43-year-old David Dooley, concluding that surveillance video footage was crucial evidence withheld from Dooley’s defense.

Dooley has maintained his innocence regarding the 2012 death of 42-year-old Michelle Mockbee who was found beaten outside her office at Thermo Fisher Scientific in Florence.

The video shows an unknown man trying to enter the Thermo Fisher building the night before the killing. Dooley’s attorneys argue the video shows someone else could have accessed the property and committed the murder.

Dooley is scheduled to appear for a pretrial conference on June 10.

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