(Corrects third paragraph to show that the plaintiffs include 13 family members of Sandy Hook victims and one FBI agent, not 14 family members) By Jack Queen (Reuters) -U.S. conspiracy theorist Alex Jones faces trial this week in Connecticut to determine how much he must pay a group of families of victims of the 2012 Sandy Hook Elementary School mass shooting that left 26 dead, including 20 children, for falsely claiming it was a hoax. A jury in Texas, where Jones’ radio show and webcast is based, last month held that he must pay two parents of a child killed in the Newtown, Connecticut, massa…