The Miami police versus Florida Highway Patrol battle just got a whole lot dirtier. Over the weekend, a Miami City commissioner-turned-trooper discovered that five gallons of human excrement had been poured over his car while it was sat outside his home.

The feud was sparked off by a video leaked last month of FHP Trooper Donna Watts pulling over, arresting and detaining a speeding Miami Police officer at gunpoint.

When she recorded officer Fausto Lopez driving 120mph to an off-duty job, she pursued and then pulled him over and arrested him.

Law enforcement officers say the incident caused major friction between the agencies.

Rumours have been circulating that city police are attempting to get their revenge on the troopers, especially after Joe Sanchez found the excrement – which appear to have come from a port-a-potty – all over his car.

FHP Union President Bill Smith told CBS: 'I think it’s just some disgruntled employees of other agencies, hopefully it’s not the City of Miami, I don’t know.

Despite the growing feud, Trooper Smith says everyone behind a badge will help each other when it counts. 'They might glare at each other but I really honestly think they’ll be back there to back each other up.'

Check out the videos below:

[youtube:http://youtu.be/ONj4NpuJByY] [youtube:http://youtu.be/2OGrnSMwMFI]