A 51-year-old woman was arrested this week on charges of second degree homicide in Manatee County, where her first ex-husband lived, according to Sheriff Rick Wells.

Authorities in Florida are accusing a 51-year-old woman of shooting and killing two ex-husbands on the same day this week.

Susan Erica Avalon was arrested on Thursday on charges of second degree homicide in Manatee County, where her first ex-husband lived, according to Sheriff Rick Wells.

Police in Tampa, where Avalon`s second ex-husband lived, said detectives are working with the State Attorney`s Office to determine "what charges, if any, are applicable in the case."

It all started on Wednesday afternoon when the Manatee County Sheriff`s Office received a call to respond to a shooting in the Heritage Harbor neighborhood, according to Wells. When deputies arrived, they saw a 54-year-old man with two gunshot wounds.

He was shot in the abdomen, Wells said in a press conference Thursday. "The victim at the time is still alert and is speaking to us."

When deputies asked him who could have done this, the man responded, "possibly my ex-wife," Wells said.

The man`s 15-year-old daughter was at the home and heard the shots, according to Wells. When she looked out the window, the teen spotted someone wearing a gray sweatshirt and a mask getting into a silver Honda Odyssey and driving off."

"I want you to understand how traumatized she is," Wells said of the 15-year-old, who is also Avalon`s daughter.

The 54-year-old man was taken to a local hospital, where he died of his injuries Wednesday night, according to the Manatee County Sheriff`s Office. Before dying, the man told authorities he was shot upon answering the door to his home.

Authorities believe Avalon showed up at the victim`s home posing as a food delivery driver, Wells said.

Court records from the Manatee County Clerk`s Office show Avalon and the 54-year-old man had been divorced for nearly a decade and had long been dealing with issues of child custody as well as child support disputes.

On Wednesday, investigators later located Avalon in her home in Citrus County, where they saw her wiping the silver Honda Odyssey vehicle with cleaning rags and bleach, Wells said.

When investigators told her they are there to speak to her about her ex-husband, she responded, "which one?" Wells said.

Investigators then began digging into Avalon`s second ex-husband, who lived in Tampa. The Manatee County Sheriff`s Office requested the help of the Tampa Police Department to check on the man and found he had been shot and killed in his home.

In a news release Thursday, the Tampa police said they believe the incident is related to "an ongoing homicide investigation being conducted by the Manatee County Sheriff`s Office."

"Investigators are working to determine a motive, but it`s believed the shooter and victim are known to one another," the news release reads.

Authorities believe Avalon first went to Tampa to kill her second ex-husband before heading to Manatee County and shooting her first ex-husband, the 54-year-old man, Wells said.

Avalon was arrested on Thursday by sheriff`s deputies in Citrus County, where she lives, on an out-of-county warrant, jail records show.

NBC News could not find an attorney listed for Avalon as of Saturday.

Wells said his office`s ongoing investigation is focused on finding the murder weapon and searching Avalon`s vehicle for evidence.

"That`s our goal right now," he said.