There have not yet been any arrests, or description of suspects, in this week’s shootings of two Ferguson, Missouri police officers, but one black activist says he has a hunch who is responsible. Martin Davis, an author and activist, appeared on Tim Constantine’s D.C.-based radio show Thursday and said he suspects the shooter was part of some type of white militia trying to cause chaos. “What I’m thinking is it was either somebody who was some type of great sharpshooter, some type of militia, some type of, you know, just person who wanted to see chaos that night,” Davis said...