ST. AUGUSTINE, Fla. -- When St. Johns County Sheriff's Office deputies arrived at the Duval Street home of Frederick Gilliam, he was standing on the porch, holding a knife and covered with blood.

The Sheriff's Office believes -- but has not yet confirmed -- that this was the knife that Gilliam, 47, used tocut his wife, Stephanie T. Gilliam-Singleton, 44,in the neck, killing her.

Frederick Gilliam has been charged with second-degree murder in the death of Stephanie T. Gilliam-Singleton.Police believe the incident is one of domestic violence, Catherine Payne of the Sheriff's Office said, butthey are uncertain if this is the result of repeat violence or if this was the result of a one-time incident.

After being taken to Flagler Hospital for minor injuries, Frederick Gilliam was questioned bypolice.Gilliam told them that he and his wife were victims of a home invasion robbery, but his story did not match up with evidence

Cheryl Strickland, the St. Johns County Clerk of Court, spoke about the loss of Stephanie Gilliam, one of her employees Tuesday.

Stephanie Gilliam wasstabbed and died Monday at her St. Augustine home.

Gilliam was a supervisor for the St. Johns County Clerk of Court in the family division.

Strickland said Gilliam was "the go-to person" for many cases because of her knowledge.Strickland said Gilliam was a supervisor for about 20 people who are all trying to deal with the sudden loss of a leader.

Gilliam was well liked by judges and fellow clerks.

Her husband has been arrested in the case.

The St. Johns County Sheriff's Office is expected to release more information about the case Tuesday afternoon.