When California legalized recreational cannabis, Silicon Valley envisioned a new Gold Rush. Tushar Atre — a tech entrepreneur, surfer, and disruptor — thought he could bridge two worlds: venture capital and the black market. On Oct. 1, 2019, he was shot execution-style on his own property, hands bound. Investigative journalist Scott Eden, author of the new book "A Killing in Cannabis," spent four years unraveling what happens when ambition meets an industry that never forgot its outlaw roots.