Andrew Holt was a member of the Los Pollos Hermanos security staff, serving as an enforcer for Gustavo Fring's drug empire under direct supervision of Mike Ehrmantraut. One of Fring's offshore accounts was set up in his name.
Gus had Holt guarding the perimeter of his meeting with the heads Juárez Cartel after they had stolen some meth from them and gave it away. ("")
He was arrested following the murder of Gus and the discovery of the methamphetamine super lab at Lavandería Brillante and his accounts were seized. The organization initially continued to pay him through a series of dead drops via his lawyer Dan Wachsberger. The arrest of Dan and the subsequent disappearance of Mike ended this practice. Fearing that he would testify about his involvement, Fring's successor Walter White had him, and nine other members of the organization, murdered in prison.
Holt was killed when one of Jack Welker's men bashed his head into a prison wall and then proceeded to stab him in the back of his neck. ("")