Overspeeding

I was driving on  my way to work at around 5 in the morning. I'm driving 70mph on 65mph speed limit. In my rear veiw mirror I saw this car running so fast which kinda pissed me off because I felt like he's driving way too fast. So I speed up and he speed up too and finally overtake me. Then I found out it was a CHP car.  I was so relieved when he didn't stop. I thought I will be ticketed. Since then I don't over speed anymore. Instead I just start heading out an hour early. Better safe than sorry.