Aurora police have identified the man arrested in the drive-by shooting of an Aurora Central High School student.Luis Guzman-Rincon, 19, of Aurora was taken into custody by Aurora police Wednesday but his identity was withheld by police until Thursday afternoon. Police said Guzman-Rincon is believed to be an illegal immigrant. He is being held in the Arapahoe County Jail on investigation of criminal attempt first-degree murder and first-degree assault on a $100,000 bond.Immigration and Customs Enforcement has placed a hold on Guzman-Rincon, Aurora police said. His mugshot has not been released because police need to conduct additional photo lineups. A 17-year-old Central High School senior, Karina Vargas, was shot in the torso Monday afternoon outside the school.A reward of up to $5,000 had been offered by Aurora police for information leading to the arrest and conviction of the person responsible for shooting.Police did not say what led them to Guzman-Rincon.Citing the need to protect the advancing investigation, police released few details about the Monday afternoon shooting of Vargas.Detective Robert Friel said detectives are investigating whether the shooting was gang-related.Police updated the description of the getaway vehicle as a 1990s black Infiniti sedan. Friel said detectives are trying to identify the car's license plate.Vargas was shot while standing on the street at East 11th Avenue at Newark Street, just north of campus.The girl's family issued a statement Wednesday thanking the public for support and requesting privacy as they focus on the recovery of their daughter at University of Colorado Hospital. "This is an incredibly difficult time for our family, but we are thankful for the outpouring of community concern for our daughter," the Vargas family said in the statement. "We remain focused on giving her the attention and care she needs to heal."Friel stressed that investigators believe the girl was just standing in the wrong place at the wrong time."I want to make it clear that she wasn't involved in any kind of dispute, altercation, fight," he said. "It's very possible she was simply an innocent bystander when the shot rang out."Anyone with information about the case is asked to contact Aurora police Detective Gretchen Fronapfel at 303-739-6013.