Wernich's trial began on 5 July 2007 in La Plata, the capital of the province of Buenos Aires. He was accused of seven homicides and 41 instances of kidnapping and torture. The tribunal was composed of judges Carlos Rozanski, Norberto Lorenzo and Horacio Insaurralde, the same panel which had convicted and sentenced Miguel Etchecolatz in 2006. Before the trial, Wernich denied all charges, saying that while he did visit detention centers, he did not witness any human rights abuses there; however, on the first day of the trial, he exercised his right to silence.