A San Jose police officer died in March of “fentanyl toxicity,” medical examiners confirmed. De’Jon Packer, a 24-year-old rookie at the San Jose Police Department and a former returnee, was found indifferent March 13 during a welfare check at his home in Milpitas. The San Jose Police Officer John Packer. (SJPD) Santa Clara County Medical Examiner confirmed to KNTV on Saturday that Packer died of a drug overdose. The death remains under investigation by Milpita police. San Jose Police Chief Anthony Mata said his department does not approve of drug use and is cooperating with Milpita’s investigation. FATHER WHO LOST FEDANIL’S DAUGHTER DEMANDS ACTION AT THE BORDER: “HE DID NOT OVERDOSE, HE WAS POISONED” Mata said the police department has scheduled training on substance abuse prevention for staff and offers emotional support services to officers. “We have to be careful that we do not have immunity to issues that plague society, in this case of substance abuse. As humans we are not perfect and mistakes will be made,” Mata said. “Any allegation of drug abuse by a San Jose police officer is worrying. There are no free police passes and we will not be justified.” CLICK HERE TO RECEIVE THE FOX NEWS APPLICATION Packer was a star who ran at San Jose State University before becoming a police officer. “We all loved DeJon Packer and we will miss his infectious smile,” said SJSU football coach Brent Brennan. The Associated Press contributed to this report.