"The institutions of the state that have to aid the judges in the investigations of their cases are severely weakened under a dictatorship," Bates said.
Public opinion continues to shift
As time passes, the views of who was responsible for the coup continue to evolve.
A poll by the Chilean Center for Studies of Contemporary Reality found that 41% of respondents blame Pinochet for the coup, an increase of 17 points in 2003. Nine percent of those polled blamed Allende, the socialist president.
A small number of Chileans allege that Allende was creating a doomed Marxist system and that there was no option but to overthrow him.
Some 16% of those polled said the military did the right thing. In a similar poll 10 years ago, a full 36% said the military was in the right.
As the views on the cause of the 1973 coup shift, so do the views of Pinochet. His image gets worse as the years go by, according to the poll.
According to the pollster, 1,200 Chileans were surveyed, and the study has a margin of error of 3%.