"Although a study has (never) been done in New Mexico on the total costs of a death penalty case to the state (including the prosecution, the public defender, and the extensive drain on court resources.), a recent Duke University study done on North Carolina’s costs found that the death penalty costs North Carolina $2.16 million dollars per execution over a system that imposes life imprisonment." (2)
Complete utter nonsense, of course.
The North Carolina study (1) found LWOP to be much more expensive than the death penalty.