TONIGHT: Vicky Nguyen reports on test strips that are supposed to detect the presence of deadly fentanyl in illicit drugs, but sometimes fail to do so with tragic results. | NBC Nightly News with Tom Llamas

NBC News’ Vicky Nguyen takes us to Perrysburg Township, Ohio, where a team of detectives respond daily to organized retail crime and track stolen goods online. The goods often end up on Facebook Marketplace. In a statement, a Facebook spokesperson says in part, “We prohibit the sale of stolen goods on our platform and use a number of tools to prevent this kind of fraud.” | NBC Nightly News with Tom Llamas