(13-WHAM)  Parole hearing transcripts for William Spengler show that the parole board was worried he might become violent again.

Spengler opened fire on first responders Christmas Eve morning as they rushed to put out a fire he set in a car and home on Lake Road in Webster. Two firefighters were killed in the attack and two others were injured.

In 1981, he was convicted of killing his 92-year-old grandmother with a hammer.

Transcripts from 1989, 1991, 1993 and 1995 show repeated hesitate to grant Spengler parole because the board was concerned he would become violent again.

In 1989, when he was asked, "What if that happens again," Spengler responded: "That's the thing that does worry me in terms of if you're capable of it once, are you capable of it again."

Then, in 1995, one of the commissioners said, "There might be an occasion where you lose your temper and you might repeat that behavior. That is what frightens us. That frightens us."

Spengler served 17 years in prison, and was on parole until 2006.