Delisa Tucker lost her brother to gun violence two years ago, and almost lost her 6-year-old daughter years before that. Early Wednesday morning, she was attending to yet another family tragedy, the weekend killing of her 14-year-old son Kevin Tinker just down the street from their home in Roseland. Friends say she was steps from a memorial to her son, intending to light a candle, when there was gunfire. Tucker was hit in the chest and died. "It's just sad that this whole family, basically, to be killed over time," said Pastor Donovan Price, who said he consoled Tucker at...