From a June 8, 2016 article in the New York Times, Bangladesh Says It Now Knows Who’s Killing the Bloggers:
In a lengthy interview, the chief of the police counterterrorism unit, Monirul Islam, who assumed his post in February, laid out the findings of his investigation in minute detail.
But secularism is far from universally accepted in Bangladesh, and has always had to contend with a conservative Islamic culture.
To a surprising extent, the militants have succeeded in their aim of discrediting secularism, the chief investigator said.
“In general, people think they have done the right thing, that it’s not unjustifiable to kill” the bloggers, gay people and other secularists, he added.