The brother of a man killed by one of two murderers who escaped from a maximum-security prison says the prison break has turned his world "upside-down all over again."

Steven Tarsia tells The Associated Press he couldn't believe it when he found out David Sweat and fellow inmate Richard Matt broke out of an upstate New York prison.

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Sweat was convicted of first-degree murder for killing Sheriff's Deputy Kevin Tarsia in 2002.

The inmates used power tools to cut their way to freedom and emerge from a manhole cover blocks from the prison. They were reported missing from their beds at about 5:30 a.m. Saturday.

Authorities are investigating how they could have gotten the tools.

Steven Tarsia says he thinks they must have had help, but can't imagine why anyone would have helped them.