HBO Films has picked up the rights to the political thriller, The Whistle Blower for distribution through Focus Features.

The film is based on the real-life story of a female Nebraska cop who served as a peacekeeper in post-war Bosnia and outed the U.N. for covering up a sex scandal, notes Variety. Larysa Kondracki will direct from a script she co-wrote with Eilis Kirwan; they focused extensively at Kathryn Bolkovac, who traveled to Bosnia in 1999 as a U.N. peacekeeper.

Bolkovac investigated sex trafficking, domestic abuse and sexual assault, and ultimately alleged that peacekeepers, U.N. workers and international police were visiting brothels and facilitating sex trafficking by forging documents and aiding the illegal transport of woman into Bosnia.