The victim, John Gibbs, 84, is a Vietnam veteran with pancreatic cancer who lives near Herrick on Seminole Boulevard in Largo.
According to the arrest affidavit, Herrick wrote herself a $2,500 check back on April 6.
Investigators say Herrick befriended the victim in the days leading up to the theft with the intention of stealing from him.
Herrick was going by the name Sonya Shaw, according to neighbors.
Another friend of the victim, whose identity we are not publishing at this time for their own privacy, noticed the missing funds, and brought this to the attention of the victim, who said they did not write Herrick a check.
Herrick, 51, was charged with felony theft by the Largo Police Department. She has a history of theft, according to online arrest records.