Dr. William Petit Jr. will run for a seat on Connecticut's state legislature as the Republican Party's nominee in the 22nd house district, sources confirm with NBC Connecticut.
Petit, 59, whose wife and two daughters were killed in a 2007 home invasion in Cheshire that horrified the country, decided not to run for Connecticut’s 5th congressional seat two years ago.
An official statement will be put out next week, Petit told NBC Connecticut.
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Following the murder of his family, Petit fought against the repeal of the death penalty.
The men responsible of murdering Petit's two daughters and wife were on death row during the time of the repeal.
Last year, Connecticut's highest court has overturned the death penalty in the state by a 4-3 decision, saying it's unconstitutional.
Joshua Komisarjevsky and Steven Hayes were convicted of killing Jennifer Hawke-Petit and her daughters.
Hayes raped and strangled Hawke-Petit, while Komisarjevsky sexually assaulted her 11-year-old daughter, Michaela. Michaela and her 17-year-old sister, Hayley, were tied to their beds and died of smoke inhalation after the house was doused in gas and set on fire.