WICHITA, Kan. (AP) -- Survivors of a Highway Patrol trooper gunned down on the Kansas Turnpike 31 years ago are pleading with parole officials to keep the man convicted of the killing behind bars.

Fifty-three-year-old George Rainey is serving a life sentence for first-degree murder. He was convicted of shooting Trooper Ferdinand "Bud" Pribbenow six times after being pulled over for speeding near El Dorado in July 1981.

KAKE-TV reports (http://bit.ly/KyxqfR ) the Kansas Prison Review Board is considering Rainey's fifth request for parole.

The board heard opposition Tuesday from Pribbenow's widow and three daughters. One of the daughters noted that Rainey had opened fire on a man he didn't know, without speaking a single word.

The review board will talk with Rainey before making a decision, expected by the end of July.