Thread: In late 2017, I heard about an immigration crackdown in the supposed sanctuary state of Washington. ICE arrested a mom selling a piñata on Facebook. A grandpa who'd filed U.S taxes for almost 20 years. A school social worker. Dozens from one coastal county. ICE officers rolled in knowing names, nicknames, numbers, addresses, license plates, emails, social-media handles, patterns of life. "They knew everything," residents said. I decided to find out how. Many months + many records requests later, some answers: nytimes.com/2019/10/02/mag…