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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)

Jacquelyn Martin/Associated Press/File 2017

The scourge of fentanyl is more clear in the battle against opioid use

Now, fentanyl is found in the bodies of nearly 90 percent of those who died of opioid overdoses.

// Trump executive granted immunity in Cohen inquiry

Allen Weisselberg has testified in federal court about his role in the payment of hush money to a porn actress.

// State Police probe clears leaders in hiring of trooper with drug-dealing past

Questions about how Trooper Leigha Genduso, an unindicted co-conspirator in a major marijuana trafficking case, became a civilian dispatcher in 2008 and then a trooper erupted earlier this year.

// Candidate Brianna Wu is learning the rules of a whole new game

Brianna Wu, a video game developer, is trying to channel her online renown into a campaign for Congress.

// What’s that smell? Electronic noses can sniff it out

Cambridge-based C2Sense is one of a number of companies developing technology that can sense and identify scent.