Mexican high court orders release of defendants convicted in 1997 killings of indigenous people . Court rules evidence seized illegally , defendants denied due process . Unarmed indigenous men , women and children massacred in state of Veracruz . Killers thought Indian peasants had ties to Zapatista Army of National Liberation .
Mexican high court orders release of 20 convicted in 1997 killings of 45 people . Court rules evidence obtained illegally , defendants denied due process . Unarmed indigenous men , women and children massacred in state of Chiapas . Killers thought Indian peasants had ties to Zapatista Army of National Liberation .