Parents can't believe children's deaths last year were homicides Mourning without answers 05/30/2002 By ROBERT THARP / The Dallas Morning News The brightly painted house on North Cliff Street still looks like a home where children might play. Holiday decorations hang from the green walls and the yard overflows with flower gardens and lawn art. German Tovar and his wife, Martha Avitia, leave for work every day and return to their east Oak Cliff home. But for a year, they have been coming home to an empty house after the couple's two children were found slain a year ago...