HOUSTON—Authorities on Monday asked for the public’s help in finding a 51-year-old man who has been charged with fatally shooting a Houston-area deputy during a traffic stop this past weekend. Houston Police Chief Troy Finner said investigators have identified the accused shooter as Oscar Rosales. Harris County Precinct 5 Cpl. Charles Galloway, 47, was shot and killed around 12:45 a.m. on Sunday after pulling over a Toyota Avalon. Authorities allege Rosales got out of his vehicle, fired multiple shots at Galloway with some type of assault rifle and then got back in his car and drove away. “We have video evidence of him shooting our constable,” Finner said during a news conference. He declined to provide more information about the video evidence, citing the ongoing investigation. Prosecutors have filed a charge of capital murder against Rosales and authorities are offering a reward of $60,000 for information leading to his arrest, …