Going up in smoke tomorrow will be 769kg of cocaine — a stock that was kept as court case evidence and released after a lengthily legal process.The large stock will be inspected by a magistrate and subjected to sample testing on site by the Government Analyst, a senior police source told the Sunday Times. The exercise will be open to media coverage, said Dr. Samantha Kiathalawaarchchi, Director of the Presidential task force on drug prevention. The process will begin at the DNS Warehouse complex at Gonawala in Kelaniya tomorrow morning.