KANSAS CITY, Mo. -- A 30-year-old man will serve four life sentences without parole for killing a Kansas City-area couple at a Bible store they had operated for 40 years.

Kellen McKinney was sentenced Thursday to two life sentences without parole on two first-degree murder convictions and two life sentences on two armed-criminal action counts. He also got four years for an escape charge.

McKinney was convicted by a Johnson County jury on Feb. 29 for the Oct. 20, 2004, stabbing deaths of John and Mildred Caylor.

A friend saw the couple's bloody bodies through the window of the Caylors' Bible and Music Store in Raytown and called police.

Prosecutors said DNA tests linked McKinney to the slayings.

The judge called McKinney so dangerous he wanted to make sure that he never walked the streets again.

"It doesn't bring Mom and Dad back, but the system didn't give up. It's been three years, five months, six days," said Rick Caylor, the victims' son. "The judge did the maximum sentence he could under the laws of the state of Missouri, and the sentences are consecutive, so hopefully it will set an example for anyone else who thinks they can get away with anything like this."