Pizza row killer faces life sentence

A gambler who stabbed a grandfather to death in a row sparked by the killer giving the victim’s dog a slice of pizza is facing life behind bars. Joseph Tripp, 34, flew into a rage during the argument with Derek McAllister, 54, and spent £5 on the biggest carving knife he could find from a nearby hardware store. Tripp hid behind some parked cars before leaping out and plunging the eight-inch blade into Mr McAllister on Finchley High Road, north…