She was arrested Thursday on South Padre Island after a restaurant employee recognized her from national news coverage of the manhunt.
'She had a smile on her face like a vacationer, not really anxious that people were looking for her.
She was captured in South Padre Island last Thursday is now being held without bond.
She bought a sandwich and asked for directions out of state.
According to a spokesperson for Cameron County, Texas, both states' authorities now have 10 days to transport Riess.
She had been on the run since allegedly killing her husband, David Riess, in their Blooming Prairie home last month.
Authorities were called to Fort Myers, Fla., on April 9 and found Pamela Hutchinson, 59, of Bradentown, Fla., dead of gunshot wounds.More news: Syrian Forces Retake Town After Rebels Depart
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Deputy U.S. Marshal John Kinsey confirmed Riess claimed a prize at the Coushatta Casino Resort in Kinder, La., on April 8.
Investigators from the sheriff's office and the Minnesota Bureau of Criminal Apprehension went to Texas early Friday morning to help execute search warrants and gather information in her husband's case. In Minnesota, Riess has been charged with one count of larceny and second-degree murder charges are pending.
"Investigators hope that her voice on the video, in addition to other videos and images released, will help someone recognize her whereabouts so she can be taken into custody before anyone else gets hurt or killed", said Dodge County Sheriff Scott Rose in a statement.
Marshals said Riess let her guard down when entering the establishment.
Riess is believed to be armed and risky and was last seen driving Hutchinson's vehicle, a white Acura TL, with Florida license plate Y37TAA.
Riess was also spotted on CCTV cameras driving up to a Hilton hotel in Ocala before calmly walking through the lobby wearing her alleged victim's hat.
Riess was arrested in Texas.