Keeping pace with a speeding cop is always a beautiful thing.
The trick is to stay back about 1/4 mile, then match his speed.
This morning a bike cop was going nowhere, but fast. I'm sure I was nothing more than a fuzzy light in his mirrors at 85+ mph, so he couldn't do much to prove I was speeding along with him if he wanted to.
Needless to say...I sure got to work fast.