Nation Brian Laundrie wrote in notebook that he killed fiancee Gabby Petito, FBI says January 21, 2022January 21, 2022 Christal Hayes, USA TODAY Comments Off on Brian Laundrie wrote in notebook that he killed fiancee Gabby Petito, FBI says Brian Laundrie wrote in a notebook found with his remains that he killed fiancee Gabby Petito, the FBI said Friday.