This week the Trans-Border Institute’s Justice in Mexico project released a new report, “Drug Violence in Mexico: Data and Analysis Through 2010”. This report incorporates recently released government data with other sources to examine the patterns of violence in Mexico in recent years as well as the factors that have contributed to infighting among Mexican drug trafficking organizations. The report underscores the dramatic increase and geographic concentration of violence in the Mexican states of Chihuahua, Sinaloa, Guerrero, and Baja California, and examines the spreading and intensification of violence due to splintering among cartels and drug trafficking organizations. Written by David Shirk, IEDS board member and Director of the Trans-Border Institute, and Viridian Rios, doctoral candidate at Harvard University, this report is available here.