KANSAS CITY, Mo.—Kansas City Chiefs cornerback L’Jarius Sneed remained with his family in northern Louisiana on Sunday, two days after his oldest brother was stabbed and killed by a woman in an altercation involving a large kitchen knife. T’Qarontarion “TQ” Harrison, who largely raised Sneed as a child, was stabbed in the town of Minden, where police chief Steve Cropper said the 32-year-old Harrison “died from a single stab wound to his back that punctured his lung.” Angela Washington, 47, has been charged with second-degree homicide. Authorities didn’t offer a motive, though a kitchen knife was found at the scene. It wasn’t immediately clear if she had an attorney who could comment on her behalf. “Such a tragic situation,” Chiefs quarterback Patrick Mahomes said after a 48-9 romp over the Raiders, “and as a brotherhood and as an organization, we’re going to support our brothers. I thought our guys played …