A former prosecutor whose trial following groping allegations fuelled South Korea's #MeToo movement walked free on Thursday after his conviction was quashed by the country's top court. Ahn Tae-geun, 53, was jailed for two years for abuse of power in January last year after being accused of repeatedly groping a female junior colleague at a funeral in 2015. After Seo Ji-hyun filed a formal complaint, Ahn allegedly had her transferred to a provincial post, significantly impacting her career. Seo went public with a tearful live television interview in 2018, which triggered a flood of similar accusations against powerful men in fields ranging from art to politics that grew into a South Korean #MeToo movement. Despite its economic and technological advances the South remains a patriarchal society, and has one of the world's thickest glass ceilings for women. Ahn -- who was separately fired for corruption in 2017 -- could not be charged with sex abuse because the one-year statute of limitations had expired. Instead he was indicted for abuse of power, accused of using his position to pressure senior prosecutors to reassign Seo to a junior position in revenge. But the Supreme Court on Thursday quashed the lower court's decision and ordered a retrial, saying it was difficult to conclude one of Ahn's actions -- asking a prosecutor to write a document related to Seo's transfer to a provincial post -- was a form of power abuse. The original ruling "misunderstood legal principles on the crime of abuse of official authority", the Supreme Court said in a statement. "The original verdict is quashed and the case is sent back for re-review and a new decision." cdl/slb/je