Whenever the MEK gets involved, you can be assured there is neocon idiocy nearby. Doesn't hurt that one of the arch-neocons is holding the bag on a bunch of Argie bonds which have 0 hope of full redemption.
I still consider the death of Nisman to be suspicious; both the neocons and the Kirchner government are wicked enough to have stooped to such a murder. Such a plot would require the gun's owner to be "in on it" to some degree, though; so that trail will likely be cold forever if there's anything to it.