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By Associated Press

Sept. 4, 2018, 6:43 AM UTC / Updated Sept. 4, 2018, 7:14 AM UTC

CLOVER, S.C. — A South Carolina woman has been charged with murder after killing her husband by putting eye drops into his water for several days, according to authorities.

York County deputies said 52-year-old Lana Clayton confessed to investigators after an autopsy uncovered a high amount of tetrahydrozoline in her husband's body.

The chemical is found in over-the-counter eye drops such as Visine.

Authorities say 64-year-old Stephen Clayton was found dead July 21 in the couple's home in Clover.

Arrest warrants and the statement from deputies didn't give a motive for the alleged poisoning.

Lana Clayton also is charged with malicious tampering with a drug product or food.

Jail records did not indicate if she had a lawyer.