I would love for someone from The Times who worked on this story to share the source of their data. No one on Twitter nor in their interview on The Daily answe

I would love for someone from The Times who worked on this story to share the source of their data. No one on Twitter nor in their interview on The Daily answered my main question: What was the source? Sure, they don't want to reveal private information about the people they highlighted, but what about the millions of dots they plotted on the map? That data came from somewhere. Did someone leak it? Did The Times buy it? Some transparency would be great.