A petition urging Florida officials to show leniency toward Harjinder Singh, an illegal immigrant truck driver accused of causing a crash that killed three people, has garnered nearly 2.5 million signatures as of Sunday afternoon.

Singh was charged with three state counts of vehicular homicide and immigration violations, and he was denied bond on all charges. He is being held in the St. Lucie County Jail, Lt. Andrew Bolonka from the St. Lucie County Sheriff's Office said. U.S. Immigration and Customs Enforcement has put a hold on him.