Gabby Petito update: More details about Brian Laundrie's 'burner' phone, campground trip

The FBI agents investigating the Gabby Petito case have seized a cellphone belonging to Brian Laundrie, with some reports saying he bought the "burner" phone shortly after returning home from his cross-country trip with Petito. Meanwhile, investigators are learning more about the camping trip Laundrie took with his parents in early September, including gathering surveillance video of the family at Fort De Soto Park in Pinellas County, Florida.