DANNEMORA, N.Y. (Court TV) — A man convicted of killing his father because he was angry over his reduced weekly allowance is speaking out for the first time behind bars. Thomas Gilbert Jr. (Interview With A Killer) Thomas Gilbert Jr., 41, was sentenced to 30 years to life in prison after a jury found him guilty of second-degree murder in the death of his father, Thomas Gilbert Sr. Gilbert Jr. was a 30-year-old Princeton graduate living in New Yo…