A 16-year-old girl was gunned down in a quiet Chicago suburb Saturday morning — and authorities have neither caught nor identified her suspected killer. The victim, identified as high school sophomore Lilly Bova, was killed in the Cook County neighborhood of Glenview around 11 a.m., authorities said. Sheriff’s deputies are searching for a person of interest but have revealed few details about who may have killed the well-liked teen. “While we cannot share further details at this time, this was