FERNANDINA BEACH, Fla.—Despite her bright smile, a deep pain smoldered behind Michele Holbrook’s eyes. She had experienced one of the most agonizing experiences a mother can have—the loss of her son.  Chandler Cook, a towering young man at 6 feet 5 inches, died in April last year by an accidental overdose at the age of 28. Unbeknownst to him, his street-bought heroin had been spiked with fentanyl—an ultra-potent synthetic opioid of which just 2 to 3 milligrams can kill.  “That’s my son,” Michele told The Epoch Times, pointing to a framed photo of herself and Chandler in her living room. There were even more photos on her bedroom wall, and in a photo album she later brought out. “I remember that feeling inside of me just wanting to run, run as fast as I can, just to get away—that it was a dream,” she said. Learning of his overdose “was …