I almost didn't see the movie because of the title, then I read the description in the SXSW directory, and I'm glad I did; it's up there amongst my favorite films from the 2004 selections.
A real killer diller, can really play, according to Vernon (Lucas Black), an austic savant at piano, who crosses paths with Wesley (William Lee Scott), a car thief sent in a halfway house. Wesley has a way of getting into trouble, but this time, manages to get something right, by striking up a friendship with Vernon, and turning the halfway house gospel group into a rockin band. The music is real killer diller, the acting engaging, and the crisis is plotted out very realistically. Scott and Black both do outstanding jobs in their roles, and they have chemistry as unlikely friends; you believe the bond. W. Earl Brown is equally believable as the gruff, loving father who does what he can to love and protect his son. Fred Willard, as the director of the halfway house, provides comic relief by believing in his mission to help the kids and in joyfully spiting his brother, who doesn't think a bunch of criminals belong in their community.
The music is outstanding; director Tricia Brock got the blues, by bringing in real bluesmen like Keb Mo' and Tree Adams to work the soundtrack and to work with the Killer Diller Blues Band. And actress Niki Crawford does her own singing (and the SXSW audience heard live proof of it). I hope there is a soundtrack released; the music is hot, rocking blues. See this movie!