To get this window, a plan is hatched to execute a Triple 9 — police code for officer down. (moviemanjackson.com)
The children must crack the secret police codes to elimate the innocent suspects (cross them off) and reveal the final two suspects. (tes.com)
In Triple 9, a crew of dirty cops is blackmailed by the Russian mob to execute a virtually impossible heist and the only way to pull it off is to manufacture a 999, police code for «officer down.» (fatmovieguy.com)