Updated

A prison official has testified that a Connecticut man convicted in a 2007 deadly home invasion threatened to kill a correction officer in March, saying he had nothing to lose.

Frederick Levesque testified Monday in New Haven, where a jury is considering if Steven Hayes should get the death penalty. Hayes pleaded guilty to threatening the officer and was punished by 20 days' loss of recreation and visitor rights.

Levesque said Hayes would have limited contact with the general prison population if he gets a life sentence.

Retired state prisons commissioner Theresa Lantz testified earlier that Hayes was kept on 24-hour observation because of concerns he could harm himself. His co-defendant, Joshua Komisarjevsky (koh-mih-sar-JEFF'-ski), was not.

Hayes was convicted of killing Jennifer Hawke-Petit and her daughters at their Cheshire home. Komisarjevsky awaits trial.

(This version CORRECTS that theat against officer was in March, not last year.)