In 1970-72, a gang posing as Customs officers kidnapped and murdered seven gold merchants and hawala operators after whisking them away in the name of inquiry from lodges in Chennai. A court sentenced four of the gang to death and four others to life in prison
source https://www.thehindu.com/news/national/tamil-nadu/when-the-pethidine-killers-struck-fear-in-people-across-tamil-nadu/article67684265.ece
source https://www.thehindu.com/news/national/tamil-nadu/when-the-pethidine-killers-struck-fear-in-people-across-tamil-nadu/article67684265.ece