Open Heart Open Mind Prods. has launched development of Chris Bohjalian’s “Buffalo Solider” and tapped Russell Schaumberg to adapt.Stu Pollard is producing with Open Heart’s Scott Shea and Emily Cline (“Morning”), who’s also attached to star. Story centers on an African-American foster child taken in by a couple whose twin daughters have drowned. Bohjalian also penned “Midwives” and “Skeletons at the Feast.” Schaumburg wrote the feature film “Tennessee,” opening today in Los Angeles for a one-week run to qualify for Academy consideration. Vivendi Entertainment has acquired all U.S. rights to the pic, which will be released nationally in March.