Letelier assassinated in D.C.-- Kissinger guilty?

Orlando Letelier, a Chilean politician in Allende's government, was murdered by a bomb on September 21, 1976 in Washington D.C.
In a June 18, 1976 conversation, Pinochet tells Kissinger that Letelier is creating problems for Chile by talking with the U.S. Congress.
Kissinger informs Pinochet that he understands that he has to do what he has to do to remove obstacles from their path.
Does he basically give Pinochet permission to murder Letelier in the capital of the United States? Read the full unclassified document here at the National Security Archive Project and decide for yourself.

Below are sections from a memo of the meeting where Kissinger and Pinochet talk about Letelier.

-Sofia Adams, December 9, 2008