WATCH: Lawyers for 3 Toronto cops accused of sex assault try to cast doubt on lead investigator

The defense grills the investigator who put together the case against 3 Toronto cops charged with sexually assaulting a parking enforcement officer.

Lawyers for Toronto Police constables Leslie Nyznik, Josh Cabero, and Sameer Kara accuse Det-Sgt. Jeff Attenborough of letting the opening stages of his work fall to the wayside because his mind was on his upcoming winter vacation.

Its an allegation the veteran police offer denies.

Nyznik, Cabero, and Kara are accused of sexually assaulting a female colleague after hours of partying at an unofficial police rookie buy night' in December 2015.

The officers have pleaded not guilty.