By Andrea Januta, Andrew Chung, Jaimi Dowdell and Lawrence Hurley (Reuters) - Luke Stewart was sleeping in his car in Euclid, Ohio, when police came upon him. Moments later, he lay dying from gunshot wounds to his chest and neck. Clayton Dobbins looked suspicious to the Irving, Texas, officer who saw him riding his bike in his own neighborhood. He was chased down, shocked with a Taser and jailed. Shase Howse raised cops' suspicions by fumbling for his keys while standing on his front porch in Cleveland. He was slammed to the ground, handcuffed and jailed. None of these three men were breaking the law when they drew the attention of police. None were armed. All were black.