It has been more than two weeks since Det. Sean Suiter was killed in a violence-ridden West Baltimore neighborhood, and police have not identified, much less apprehended, a suspect. A possibly unprecedented $215,000 reward has made no difference. Meanwhile, with every passing day, new and confounding details emerge about Suiter’s role as a witness to the federal corruption case that is roiling the Baltimore Police Department. Add in some unusual details about the circumstances of his death — the radio still clutched in his left hand despite what police say was a life-and-death struggle, the lack of any surveillance video showing a possible suspect fleeing the scene — and you’ve got a recipe for skepticism, at best, and the flowering of conspiracy theories at worst.