FORT LAUDERDALE, Fla. – A Florida school district wants the families of students and staff slain in a 2018 high school massacre to turn over their social media posts from that period, saying it needs them as part of its defense against the families’ lawsuits accusing it of negligence.Attorneys for the Broward County Public Schools will ask a judge Thursday to order the families who are suing to turn over their Facebook, Twitter and other social media posts from the period after the Feb.