Who discovered Kendrick Lamar?

Who was the individual or entity that first discovered the immense talent and potential of Kendrick Lamar? Did they stumble upon his music by chance, or was there a deliberate search for the next big thing in hip-hop? Was Kendrick Lamar already making waves in the underground scene before he was discovered, or was he a relative unknown at the time? And what specific qualities or attributes did they recognize in Kendrick Lamar that led them to believe he was destined for greatness?