Tech

Flash-mob thieves used social media to plan crimes

A recent rash of thefts by fast-moving mobs at stores were organized on social media and committed by people who often didn’t know one another, according to law-enforcement officials.

Elizabeth Holmes’s testimony: Moments that might influence jurors

Elizabeth Holmes’s surprise turn on the witness stand in her criminal-fraud trial has given jurors a close look at the control she held over her blood-testing startup Theranos Inc., and at the alleged torment she endured in her personal life at the same time.

Why Instagram asks users to create second accounts

Instagram has quietly rolled out a pop-up over the past year that encourages users to "try a new account." The notice says it will help people "keep up with a smaller group of friends" and explore their interests more easily.