TIJUANA — A group of Tijuana journalists held a 5K race on Sunday to honor their slain colleague and raise funds for his daughter’s education. Photojournalist Margarito Martínez Esquivel, 49, was shot to death on Jan. 17 outside his home as he left to go cover a story. Organizers say approximately 200 runners participated in the community event held early Sunday morning at Morelos Park in Tijuana. The event was to benefit Martínez’s family, specifically with the funds earmarked for the schooling costs of his 16-year-old daughter, organizers said. “We know that he loved her very much and that ….