Following the execution of a sheriff’s deputy in Harris County, graffiti images calling for violence against police show a police officer with a gun pointed to his head are being painted on property around Houston, Texas.These taggings follow the murder of Harris County Deputy Darren Goforth was shot in the head execution-style Friday night as he was putting gas in his patrol car. The suspect who shot the uniformed deputy unloaded 15 rounds into his head and body.