Police are at their wit’s end trying to find the producers of “k-powdered milk”, a new drug cocktail which is believed to have killed seven people in Bangkok. Pol Col Thongchai Buarangsri, superintendent of Wat Phraya Krai station, said on Wednesday police have not yet found any credible evidence which points to the producers. The superintendent added the three other people who became sick after taking the drug could not be questioned yet, as they are still hooked to ventilators. Last week, seve