Tuco is a sick insane leader of the Salamanca family, he is taking the place of Hector Salamanca place since Hector had a brain damage unable to control his business

Tuco knows who is lying looking at their eyes with a very menacingly and serious sight, it's obviously he isn't playing, he control a business of meth selling and when newcomers want to deal with him they have the need to handle Tuco's presence, he always taste the product so be careful