A somber event turned grim on Tuesday when a gunman opened fire on the memorial service of slain teen Jovany Diaz. Around 2:20 p.m. a man was heard shouting at the corner of Kildare and Hirsch in West Humboldt Park. The man, who had been at Diaz's memorial just before, then fired two shots into the air, The Sun-Times reports. Kim Janssen, who was on the scene as the shooting happened, said that the gunman then pointed his gun down Kildare and fired two or three more shots. The shots hit one victim, a 24-year-old man. The man was shot...