Andrew Rene Hernandez, 22, pleaded guilty to one misdemeanor count of unsafe operation of an unmanned aircraft Hernandez faces a maximum sentence of one year in prison and is slated to be sentenced in April The drone collided with the LAPD helicopter on September 18 last year It damaged the helicopter's nose while two police were inside, and forced them to make an emergency landing The FBI raided Hernandez's home in October and he was arrested in November Hernandez was identified from the memory card of the downed drone