When he joined the Harris County Sheriff’s Office — and fought for the right to wear his turban and beard — Sandeep Dhaliwal became a trailblazer for Sikhs across North America. NYPD Sgt. Gurvinder Singh, president of the Sikh Officers’ Association, first got to know Dhaliwal in 2016, after hearing about his mission to wear his articles of faith on duty. “He was the motivation to a lot of guys here,” he said, standing inside the cavernous entrance of the Berry Center in northwest Houston on Wednesday, where he and dozens of other Sikhs from NYPD had traveled to pay their respects at Dhaliwal’s funeral. Dhaliwal was shot to death Friday during a traffic stop. Robert Solis, 47, was arrested later that day and charged with murdering the deputy, a 42-year-old father of three.