The FBI is investigating surveillance footage from Fort De Soto Park in Florida as a part of its investigation into Brian Laundrie, who has been missing since mid-September after the disappearance of his girlfriend, Gabby Petito.

A Pinellas County Sheriff’s Office spokesperson told Fox News that the FBI was looking at the footage as a part of the “the open and active investigation” into the homicide of Petito.

Petito and Laundrie spent the summer together on a cross-country road trip. Only Laundrie returned home to North Port, Florida, on Sept. 1. It wasn’t until Sept. 11 that Petito was reported missing.

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On Sunday, Sept. 19, authorities found the remains of a body that matched the description of Petito. The following Tuesday, the body was confirmed to be Petito.

Laundrie, meanwhile, has been missing since Tuesday, Sept. 14. His family reported him missing on Sept. 17.

In recent days, there have been questions about Laundrie’s whereabouts and his potential tie to Fort De Soto Park. WFLA reported that public records show the Laundrie family checked into the park Sept. 6 through 8.

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The Laundries’ attorney, Steven Bertolin, told reporter Jossie Carbonare that the family went camping during the time period.

“The family went camping. The FBI is aware of Brian’s whereabouts well after that camping trip,” Bertolin told Carbonare.