Investigators say Riess has since driven 1,300 miles along the Gulf Coast until her last known sighting in Corpus Christi, Texas. Authorities don't believe the women knew each other, but that Riess killed Hutchinson earlier this week to assume her identity. Marceno said she may be in Mexico.
"A lot of people would be more apt to keep a lookout if money is involved", said Deputy John Kinsey, with the U.S. Marshals in Florida, Fort Myers division. "She's on the run and we need to do everything we can to bring her to justice".
A nationwide search was launched Friday for Riess, who is being sought in connection with two murders - that of her 54-year-old husband, David Riess, as well as the Fort Myers Beach, Fla. murder of 59-year-old Pamela Hutchinson.
Surveillance footage caught her leaving Hutchinson's home and allegedly taking her vehicle.
Authorities say the two women talked at a bar in Fort Myers Beach and that Riess killed Hutchinson to assume her identity due to their physical resemblance.
"Riess' mode of operation is to befriend women who resemble her and steal their identity", Marceno said, calling Riess a "dangerous fugitive".
The suspect then tried to use Hutchinson's credit card for a $200 purchase in Louisiana, but was denied, Marceno said. The fatal gunshot victim was found on Monday night, but it's likely she was dead for longer as family members began questioning here whereabouts on her Facebook page.
Syria 'chemical attack': USA weighs up military response
Iran is a key ally of Syrian President Bashar Assad and has sent thousands of troops and allied militiamen to support his forces. The government, however, said evacuations from Douma were ongoing and no Syrian government forces had entered the town.
Surveillance video shows Riess talking with Hutchinson on the evening of April 5 at a brewery restaurant in Fort Myers Beach, according to the Lee County Sheriff's Office, which released the images. "We're devoting a lot of resources to this".
The body of her husband, David Riess, was found March 23, Kinsey said.
Dodge County sheriff's officials say second-degree murder charges in his death are expected in the next few days.
"U.S. Marshals are actively involved in a national search for this risky fugitive", Marceno said during a Friday press conference.
Riess remains on the run and is armed and risky, Marceno said. Callers can remain anonymous.
"It appears that our suspect is targeting women that look like her", he said.
Riess is described as 5-foot-5 and 165 pounds with brown eyes and blonde hair.