A BBC piece 'Why Mali's Tuareg are lying low' which is a little bit "light", but has this worrying passage:
Just a few minutes drive away hundreds of young men are running whooping and singing through the bush.

They are the Ganda Izo, the Children of the Land, a militia composed largely of black refugees from the north that is training now to go home - and help the Malian army root out those who collaborated with the rebels.

We are the ones who know who's who, they say - who looted, who stole, who ordered or administered Islamic punishments for smoking and drinking - and who raped.
Link:http://www.bbc.co.uk/news/magazine-21296746