A Florida man is behind bars after a witness placed him at the scene of a missing woman’s vehicle. As CrimeOnline previously reported, Titusville police are treating the disappearance of Jessie D. Kirk, a member of a prominent real estate family, as suspicious. According to Florida Today, a friend notified police around 9 a.m. Tuesday that Kirk was missing after failing to appear for her morning walk. A witness placed 35-year-old David Armstrong…