Authorities are warning families after a case that shows how quickly a routine ride home can turn dangerous for teens using ride-share apps like Uber. What should have been a safe trip instead became what authorities describe as an opportunity for a predator—highlighting risks experts say can affect any family. Investigators say 28-year-old Josiah Carroll used his role as a driver to connect with teenage boys across Montgomery County. In one case, authorities say he persuaded a teen to exchange phone numbers before sending sexually explicit messages. In another, a 13-year-old reported being lured to a parking lot.