India, Dec. 3 -- In a tense multi-day evidentiary hearing that began on December 1, Monday, Luigi Mangione's lawyers contested that he was not read his Miranda Rights before questioning him at the McDonald's.

Mangione was arrested on charges of fatally shooting Brian Thompson, the former CEO of UnitedHealthcare. The testimony revealed that police waited roughly 20 minutes into the interrogation before reading Miranda rights, long after the questioning had begun.

Under U.S. law, when a person is taken into custody and subjected to interrogation, police must first deliver the Miranda warning: the right to remain silent, that anything said can be used against them, the right to an attorney, and the right to an appointed lawyer if they cann...