If anyone knows a better way to report this event, then please let me know.
Approximately 30 minutes ago, I was driving on Beltway 8 just where it joined Hwy 59 Southwest Fwy.
A white Lexus sped past me at great speed (I was going 70, Lexus must have been 100+) and tried to squeeze in between two cars in front of me. One car was in my lane and the other was in the adjacent right lane. The Lexus barely squeezed by the two cars in front and swiped the car on the right, detaching their driver side mirror. Fortunately, no car lost control and as I drove past the car that was swiped, I saw that no one was injured.
I have a dashcam and was able to review the incident from my memory card. I have a good image of the Lexus and the license plate. When I called HPD, the operator informed me that since I was not hurt and was not at the scene, and since the car that was hit has not yet reported the incident, then they cannot do anything. I asked whether they would like to have the video so that they can see the car, and perhaps track the driver down for the hit and run, or use it as supplement in case someone made a complaint. They were not interested in taking any information down and also had no way to receive my video dashcam footage.
It was disappointing to know that this is how the system works, and that the reckless Lexus will escape without consequences. I am saving the video just in case it becomes useful.