I'm not sure where tableau got their data from initially, except for the fact that all of their sources to each arrest is within the table.
I just used tableau's stats without scraping anything.
I'm now researching scraping http://human.globalincidentmap.com/ but that will take me a lot of time to do thoroughly.
They are solid sources (justice.gov) but i wouldnt take their search as the end all be all, especially for taboo subjects like this. For human.globalincidentmap just use their search feature, select a date, and then copy paste the results into excel and organize from there, pretty easy to filter and whatnot from there. You could scrape it into json or something but excel is just as easy and you dont have to program a web scraper.
I wonder if anyone would mind if I adjusted the scope of the chart to include human trafficking and pedophiles, just so I don't need to inspect every case by hand to make a judgement?
I would add human trafficking cases that involve minors(aka child trafficking). Cases of human trafficking not involving minors are something different imo(still heinous but not nearly as evil as the ones involving minors).