FILE - In this June 6, 2017, file photo, a reporter holds up an example of the amount of fentanyl that can be deadly after a news conference about deaths from fentanyl exposure, at DEA Headquarters in Arlington, Va. The chief justice of the Massachusetts Trial Court told prosecutors she fears that allowing fentanyl and carfentanil into courtrooms as evidence puts people at risk even when the drugs are properly packaged. Some medical experts said a proposal to ban them from courtrooms appears to be driven by a misguided understanding of the real dangers of the substances. (AP Photo/Jacquelyn Martin, File)