By Bob Brigham Joe Petito and Nichole Schmidt, the parents of Gabby Petito, are alleging in an amendment to a lawsuit that Brian Laundrie went on vacation with his parents after murdering their daughter. They claim the Laundries went a nature attraction near Tampa, Fort De Soto Park, in the days before Petito was reported missing, the New York Daily News reports. “They went on vacation knowing that Brian Laundrie had murdered Gabrielle Petito, it is believed that they knew where her body was located, and further knew that Gabrielle Petito’s parents were attempting to locate her,” the lawsuit a…