Mayor Sylvester Turner, center, speaks during a press conference addressing violence issues at the homeless encampment under the U.S. 59 Highway bridge Thursday, Nov. 9, 2017, in Houston. There's been a string of shootings and a stabbing in the past three months, including a homeless man who was shot and killed Tuesday night. ( Godofredo A. Vasquez / Houston Chronicle ) Photo: Godofredo A. Vasquez, Houston Chronicle / Godofredo A. Vasquez