Casey Anthony's year of probation is ending this week, but when she will be released from state supervision is being kept secret because officials are concerned about her security.

Florida Department of Corrections officials said Monday that they will not announce publicly the end of her supervision because of those concerns.

Her attorneys several times have said the 26-year-old Anthony has received death threats.

It will be a year this week since Anthony first reported to the Department of Corrections to serve probation on a check fraud conviction. She has been serving it at an undisclosed location in Florida.

The Orlando mother was acquitted last year of murdering her 2-year-old daughter, Caylee, in a trial that captivated the nation.

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