Los Angeles Police Department officers gave 36-year-old Gurpreet Singh multiple commands for him to drop the 2-foot-long machete, but he did not comply.
24-year-old Pathania, a Melbourne resident on a two-week work trip, had been captured on CCTV working out in the gym just hours before his body was discovered in the Bentley Motel pool on January 18.
The crash killed 42-year-old mother Nancy Lefrançois and her 11-year-old son Loïc Chevalier, who were travelling in a passenger vehicle struck in the collision.