EAST COUNTY - Activist Quannell X and dozens of supporters converged Sunday on a Porter neighborhood where on Nov. 29 Gary Southworth, a white property owner, shot and killed Rodney Shamlin, a black man. Advertisement They arrived in Porter around 3 p.m. in SUVs, on motorcycles and on horseback, gathering at a nearby school before following Quannell X down West Hammond Drive to the property where Southworth shot Shamlin in the chest. Quannell walked with Rodney Shamlin's father, Lenard, and widow, Trina, to the property, where the crime scene tape was still strung. "Brother Rodney Earl Shamlin was not some...