guatemala city guatemala attorney general u.n. anti-graft body accuse mayor guatemala city alvaro arzu corruption thursday add long list influential politicians investigation suspect wrongdoing arzu also guatemalan president 1996-2000 reject accusations announce ivan velasquez head international commission impunity guatemala cicig attorney general thelma aldana velasquez unsuccessfully try impeach president jimmy morales instrumental bring predecessor otto perez say arzu suspect create fake payrolls use public fund re-election bid 2015. possible document existence bogus position guatemala municipality velasquez veteran colombian prosecutor tell news conference arzu also attend velasquez say position create relatives byron lima former security official arzu army captain die prison riot 2016 serve 20-year sentence murder bishop juan gerardi 1998. velasquez aldana work together bring charge now-imprisoned perez need supreme court approval strip arzu immunity enjoy elect official arzu one influential politicians guatemala mayor capital since 2004 try get hold microphone face accusers news conference pair try get back carry coup another president arzu tell reporters bogus position people come work every day go ahead investigate bother try strip immunity say arzu vigorous supporter president morales unlike perez manage avoid strip immunity congress put vote last month follow cicig accusations morales use illicit campaign finance run presidency 2015. velasquez aldana also accuse guatemala main political party engage illegal campaign finance set much establishment former president perez ex-vice-president prison trial corruption many senior officials cabinet also investigation suspect graft guatemala prosecutors target ex-president allege corruption