ON the morning of April 12, Michelle Gross woke up to screaming. Gross, known as "mom," in West Baltimore's Gilmore Homes area, left her home to find Freddie Gray — someone she called "son" — being dragged into a police van. As police drove away with Gray, she gave her phone to a neighbor who wanted to call 911 and report the incident. But soon, Gross and the neighbor were headed to the corner of Mount and Baker streets, where the van had stopped. There, the neighbor shot cell phone video that provides a close look at Gray and...