When its unnofficial.

just played a game as , late game got an unofficial penta, made me super happy since we were losing at the time and it won the game for us but still it was a penta, but what exactly is the timer for the pentakill announcement since ive seen people go almost 20 seconds between kills and get a penta while mine was less than 5 and it didn't say anything, also I killed an inhib between the 4th and 5th kills if that makes a difference