600 million is unaccounted for in Santa Cruz from a sale of YPF shares when Kirchner was governer when the monies were sent outside the country for "safekeeping". No one knows what happened to it nor has anyone ever confirmed if the monies were spent (if so, where and how).
From the Economist: Mr Kirchner’s governorship is remembered for something else too: the mystery surrounding some $600m in financial assets belonging to the province. (A former official in a previous national government who has investigated the matter thinks the true figure was closer to $1 billion.) In 1999 the province sold, at a big profit, shares in YPF, the privatised national oil company, which it had received in 1993 in lieu of unpaid royalties.
It held the proceeds abroad. The provincial government said that the interest was invested in public works. Opponents of the Kirchners in Santa Cruz accept that some of this money has returned to the province. Mr Kirchner has never explained what happened to the rest.
Full article here:
http://www.economist.com/node/15580245
The Kirchners were investigated by the anti-corruption task force and the report came back and stated basically there was NO legal way that their personal wealth increased the amount it did.
From wiki: Following charges of embezzlement filed by a local attorney, Enrique Piragini, on October 29, Federal Judge Norberto Oyarbide ordered an accounting expert to investigate the origin of the Kirchners’ wealth. Public records show that since their arrival to power in 2003, the declared assets of Cristina and Néstor Kirchner have increased by
572%. A preliminary report on the investigation by the Argentine Anti Corruption Office (OA) established that the official figures provided by the Kirchners "don't stack up".
[41] The investigation was suspended by Judge Oyarbide on December 30, though a week later, Piragini appealed the ruling.
[42]
Article in Spanish here:
http://www.lanacion.com.ar/1197064-avanza-la-causa-por-la-fortuna-de-los-kirchner (footnoted in the wiki article)
Wikipedia info here:
http://en.wikipedia.org/wiki/Presidency_of_Cristina_Fernández_de_Kirchner#cite_note-40
So basically, yes, they are shadier than shady, it's documented and no one has ever been willing to touch it or do a formal investigation.