This interactive stacked bar chart visualizes 2017 crime counts by offense type across Washington, D.C. police service areas (PSAs). Built with D3.js (v3), the visualization uses a stacked layout to aggregate five offense categories—such as burglary and motor vehicle theft—along a horizontal axis, with PSA segments stacked vertically. Users can hover over bars to see tooltips with exact counts via d3-tip, or hover over the color legend to highlight specific crime types while dimming others. The chart also includes a dropdown to switch between yearly datasets.