What to know about big developments in Trump investigations

There have been several major recent developments in the legal investigations into Trump, his family, and his businesses. NBC reports on how the January 6 committee has voted to subpoena Trump. ABC explains why the New York A.G. is seeking a preliminary injunction against him. And the Washington Post reports on the Supreme Court’s decision to deny his request for it to intervene in the legal fight over the review of classified documents seized at Mar-a-Lago.

NPR examined a strange pattern and found that hoax callers are reporting nonexistent active school shooters to police. 

The Washington Post reports on how so-called swatting — fake reports of violence — forced Denver to shut down all 25 public-library branches. 

Self-driving cars were the future once. One former evangelist for the technology told Bloomberg Businessweek that’s no longer the case. 

NPR spoke to scientists hoping to teach A.I. how to use people’s voices and breathing patterns to diagnose illness.