A 7-year-old girl who went missing earlier this week from her North Texas home — prompting an Amber Alert — has been found dead, authorities announced Friday. A FedEx driver has been arrested on kidnapping and murder charges. Athena Strand had disappeared Wednesday evening from her father's home in Paradise, Texas, CBS DFW reported, prompting a massive multiagency search involving hundreds of volunteers.  Her body was located Friday evening thanks to a tip investigators had received earlier in the day, Wise County Sheriff Lane Akin announced in a news conference late Friday night. The suspect, identified as 31-year-old Tanner Lynn Horner, was taken into custody Friday on charges of capital murder and aggravated kidnapping, Akin said. Horner was a FedEx contract driver who had delivered a package to Strand's home at about the time she disappeared, Akin disclosed. "We knew early on in the investigation that there had been a FedEx driver, made a delivery in front of the house, about the s