guatemala city former guatemalan dictator efrain rios montt face second trial friday genocide lawyer victims say revive case strongman accuse order massacre maya indians long civil war rios montt rule guatemala 1982 1983 military coup convict genocide four years ago along another military officer rule overturn supreme court tribunal hear case edgar rez lawyer relatives victims lead years long campaign rios montt say wednesday 91-year-old retire general diagnose senile dementia 2015. represent court two lawyers make personal appearance lawyers immediately available comment new trial revisit early accusations rios montt order massacre lead deaths least 1,771 ixil mayan indians 17-month rule rios montt maintain innocence say junior officer act without knowledge guatemala 1960-1996 civil war lead deaths 200,000 people bloody among cold war conflict tear latin america u.s.-backed military government battle leftist governments rebel genocide trial ex-guatemalan dictator rios montt restart