I lived in that area a little over 20 years ago. I went there to stay with my Mom while she had cancer. It was one of those move back in with Mom when I was a young 20 something. Her house was in Sterling, and right on that bike path. I ran and biked the path every day. On the part that goes to Leesburg, a woman had been attacked and killed, and that part was more rural that the rest. My Mom was always pretty upset with me for going it alone. As it turns out, it took the authorities around 2 years to find out the woman's ex-boyfriend had committed the crime. People were always having candle-light vigils for her.