"We use the CPS aircraft for many law enforcement missions, but primarily we are out with Colorado State Patrol working with the guys on the ground," Li said.
Li flies in a Cessna equipped with timers strapped on the instrument panel. You may not know it, but there are marks on the pavement that help calculate the speed along with using time over distance equations.
Troopers on the ground wait while communicating with the pilot. Li said he catches people speeding miles before they reach the ground units.
"I'm not out here to hunt you down, to write [you] a ticket," Li said. "I'm out here to get everyone to follow the laws."
As the population grows in the Denver metro area, troopers are seeing more aggressive drivers. It's not just speeders they're looking out for. Li said they're seeing more people tailgating and driving recklessly.
"It's not worth it. It's not worth getting a ticket. It's not worth going to jail." Li said. "You know, step back -- if you need to pull over, pull over."
If you're wondering about court, Li shows up when he's summoned to prove to a judge how his calculations are accurate.