evidence: Pipeline workers poisoned by fentanyl-laced water? Company said it never happened. [...] The letter said two employees of another company, NPL Pipeline Co., working as flaggers, were offered water bottles by a passenger in a passing vehicle. The water bottles were laced with fentanyl, which left one of the workers dead and the other critically injured, the letter said. [...] A social media post claimed two flaggers working for a pipeline company in the Chicago area were poisoned with fentanyl-laced water bottles given to them by a person in a passing car.