Bartow, Fla. (CBS Tampa) – Polk County Sheriff’s Officers have arrested a mail carrier after they say she tried to poison her husband’s tuna fish sandwich.

Beth Dickison Richards, 37, has been arrested on charges of attempted first-degree murder, poisoning food with the intent to kill, possession of cannabis, and possession of drug paraphernalia.

According to a press release put out by the sheriff’s office, deputies were called to the Richards’ residence on a poisoning complaint.

Deputies say they met with Richards’ husband, Gregory Lawrence Richards, and her step-sister, Jessica Jarvis.

Jarvis told police that Richards told her earlier in the day that she tried to poison Gregory Richards “by crushing up multiple Trazodone pills and feeding them to Gregory in a tuna fish sandwich.”

According to the release, Jarvis said that as soon as she heard this information, she immediately checked on Gregory Richards for his well-being.

Police say that Gregory Richards did take a bite of the tuna sandwich but felt nauseous and was taken to Lake Wales Medical Center.

Beth Richards is currently being held in the Polk County Jail.

She told detectives that she is employed by the U.S. Postal Service.