A South Carolina woman, known by locals who attended her neighborhood bible study, has been arrested and charged with murdering after husband.

York County deputies allegedly found out 52-year-old Lana Clayton killed her spouse, Steven Clayton, 64, when an autopsy uncovered a high amount of tetrahydrozoline in her husband's body.

The chemical found in over-the-counter eye drops brands like Visine, restricts blood vessels when poured over eyes, and takes the redness away.

However, when taken orally the decongestant acts as a neurotoxin and can attack the nervous system.

York County deputies allegedly found out 52-year-old Lana Clayton (pictured) killed her spouse, Steven Clayton, 64, when an autopsy uncovered a high amount of tetrahydrozoline in her husband's body

Steven Clayton was poisoned

The nursing employee of the US Department of Veterans Affairs in Charlotte, confessed to investigators after the coroner revealed it had been in his system for three days.

Clayton admits to spiking his food with it between July 19 and 21 and lethally poisoning him.

The 64-year-old was found dead July 21 in the couple's home on Island Forks Road in Clover. He was in a position to suggest he'd fallen down the stairs.

Seemingly without suspicion from others, his wife had held a funeral for him in their back yard earlier in August. However it was before the autopsy happened according to wsoctv.com.

According to neighbors, the couple had been married for eight years.

According to posts on her Facebook page from 2010 she had trouble in a marriage but it's not clear whether this was an ex.

She claims the man was unfaithful to her and fathered her children.

'Sorry guys. My sister just upset for me. My husband is not a drunk he had an affair. However, he is the father of my children and my kids look at my facebook. soooo . I do appreciate the support though,' she wrote February 2010.

Steven obituary reads that he survived by two stepchildren and grandchildren.

Clayton (pictured January 2017) has children according to her Facebook profile and claims she previously had marriage trouble, although it's not clear with whom

One person who lived in the area was shocked at the news about her bible study friends, telling Channel 9 News the deceased was known for his big personality.

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

Lana was the appointed representative for his estate according to York County Probate Court.

The home they lived in was worth $822,000 and modeled after the George Washington Mount Vernon Estate, his friend Ken Sanford told The Herald. Adding that Lana seemed like a 'sweet lady'.

'I am just stunned,” Sanford said. 'Steven was very proud of her accomplishments.'

The home they lived (pictured) in was worth $822,000 and modeled after the George Washington Mount Vernon Estate according to his friend Ken Sanford

The lot next door, which the Florida native also owned was worth $385,000.

His success came from founding Physical Therapy Resources which has branches across the United States.

'It makes no sense,' Deborah Pollard said. Adding: 'They are just finding all kinds of crazy ways to do things nowadays aren't they?'

Lana also is charged with malicious tampering with a drug product or food and is being held at York County Detention Center.

Jail records did not indicate if she had a lawyer but as she is charged with murder, she will not have the option of being released on a bond.