It was a quote, "sick belief that personal disputes can be settled with guns" that led a teenager to die in Syracuse. And now the person responsible will spend at least the next 50 years in jail. Our Kat De Maria takes us inside the sentencing of Tommy Davis, 34, for the death of 17-year-old Kiwan Rush.

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SYRACUSE, N.Y. -- "I am very angry. I am upset because this all could have been avoided. You are a grown man and we are supposed to protect our children, not harm them."

Angel Rush, the mother of 17-year-old Kiwan Rush, did not look at the man who killed her son as she spoke at his sentencing Wednesday. She said she couldn't.

Tommy Davis, 34, was found guilty in May of shooting and killing Rush on Eastman Avenue in October 2010. Judge Anthony Aloi said Davis and others involved in the case are part of an uncivilized culture of violence in Syracuse.

"This case and you are just another sad example of what is so very wrong on the streets of this community," said Judge Anthony Aloi.

Judge Aloi supported his strong words with a stiff sentence of 50 years to life in prison for Rush's murder and the attempted murder of Tyron West.

Davis' lawyer says her client was convicted because of West, who had shot at a house earlier the same day and who she said was not a credible witness.

"The only testimony that really connected him to the actual shooting during the course trial was the testimony of Tyron West, who had admitted he had smoked PCP, also known as water, and marijuana all day," defense attorney Randi Bianco said.

Tommy Davis' lawyer is expected to appeal his case.

Meanwhile, Angel Rush says in time, she hopes to heal and forgive him. For now, though, she gave the man who killed her son a message.

Rush said, "Tommy, it's time to accept your responsibilities and face this like a man."

Davis was also convicted of endangering the welfare of a child and weapons possession.