Three 18-year-olds pleaded not guilty Tuesday to murder and other charges stemming from a shooting at Beale Park over the weekend.Brayden Mendez, Alexa Marmolejo and Joshua Holguin are each charged with murder, conspiracy and ro bbery.The Coroner's Office said 38-year-old Mario Cortez Flores died in the hospital two days after being shot at the park late Friday night.Mendez, Marmolejo and Holguin are set to return to court for preliminary hearings later this month.This story was reported on-air by a journalist and has been converted to this platform with the assistance of AI. Our editorial team verifies all reporting on all platforms for fairness and accuracy.Stay in Touch with Us Anytime, Anywhere: Download Our Free App for Apple and Android Sign Up for Our Daily E-mail Newsletter Like Us on Facebook Follow Us on Instagram Subscribe to Us on YouTube ...read more read less