In 1982, in the small, rural village of Dos Erres, Guatemala, over 200 men, women, and children were massacred under a regime covertly supported by President Reagan. This little-publicized event leveled the town, and left one man, Tranquilino Castañeda, with nine dead children—or so he believed. Through the dogged research of three Guatemalan women, including the country's Attorney General, it emerged that two children were kidnapped by soldiers and remained alive. The activists searched for Castañeda's son, Oscar, for over 15 years, finally tracking him to a small town outside Boston in 2011 using DNA technology. Finding Oscar, a 2016 documentary film produced by Steven Spielberg, tracks the odyssey of locating the one person that could confirm what happened at Dos Erres, uncovering the truth of the events, and seeking justice. Woodstock Film Festival and WacBiz will copresent a screening of the film on September 8 at 6pm at the Rosendale Theatre. The screening will be followed by a moderated panel discussion with one of the film's producers, local resident Scott Greathead; the film's subject Oscar Ramirez Castañeda; and forensic anthropologist Fredy Peccerelli. $20.