Why were Sadat's assassination plotters released from prison?

Why did Egyptian authorities release from prison, Abboud and Tarek El-Zomor, two individuals convicted in plotting the assassination of former Egyptian President, Anwar Sadat?

Well, if you read my previous post, you would know the answer.

As I noted earlier via the New York Times:

The Muslim Brotherhood... has transformed into a tacit partner with the military government [in Egypt] that many fear will thwart fundamental changes... There is evidence the Brotherhood struck some kind of a deal with the military early on....

With the Muslim brotherhood running the show, is it any wonder why the Egyptian military government released Abboud and Tarek El-Zomor?