Pakistani SC issued an arrest warrant back in Feb for him in relation to "Memogate".
The complainants alleged that Haqqani was responsible for the Memogate scandal and had issued visas to CIA and Indian agents while serving as Pakistani ambassador to the US. They had argued that Haqqani maligned Pakistan in the books he wrote, "which proves that he is a traitor".
https://www.dawn.com/news/1389571