Her profile was mysteriously removed from the RAF man's social media accounts, while his family described him as 'happily single'.
Nielson said Wednesday that deputies arrived at a home in the Sanford area on Monday afternoon where they traced a phone number that Swanson had used to call her mother.
When they arrived at the home in the 5100 block of North Fox Road, deputies heard a loud boom.
He drove there in his blue BMW convertible, which he left in a pay-and-display car park.
The night saw him visit two bars, before being asked to leave a nightclub by bouncers because he'd 'consumed enough alcohol'.
For the man in the pictures is Corrie Mc Keague, the RAF serviceman at the centre of perhaps the most bizarre manhunt in recent years.
He disappeared six days after the romantic weekend break in London, during a night out in Bury St Edmunds, Suffolk, in which he wore the same pink shirt and white jeans.Moments later, someone came out of the home and told deputies his 28-year-old son had just shot himself.Police are not releasing either man's identity.Adding to the intrigue, meanwhile, are recent revelations about Mc Keague's relationship with his 21-year-old lover, April Oliver.Despite extensive media coverage of Mc Keague's disappearance, her existence was kept quiet for months.Stay with and TV5 as we learn more about this story, including the identity of the man police say killed himself and how he may or may not be connected to Swanson.