D.C. police continue to work with federal authorities to monitor sex offenders.

Jessica Forres rode along with a team on Halloween night to observe...

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WE'RE GOING TO HEAD OUT TO THE FIFITH DISTRICT POLICE STATION TO MEET UP WITH THE POLICE DEPARTMENT WHO ARE ASSISTING US

Paul Brennan is with the sex offender unit from the Court Services and Offender Supervision Agency, or C-SOSA. His unit and MPD work together every day…tonight they are visiting the homes of child sex offenders.

HALLOWEEN IN PARTICULAR BECAUSE WE HAVE CERTAIN SEX OFFENDERS WHO ARE NOT ALLOWED TO HAVE CONTACT WITH MINORS AND THEM HANDING OUT CANDY TO CHILDREN WOULD BE A VIOLATION OF THEIR RELEASE.

We visit the home of one man who doesn't seem to have a problem with the unannounced visit.

I'M A REGISTERED SEX OFFENDER AND PART OF MY PROBATION REQUIRES ME TO STAY IN ON HALLOWEEN TO PROTECT THE COMMUNITY. I MADE A BAD CHOICE IN MY LIFE AND I HAVE TO PAY FOR THAT.

Brennan says his unit visits offenders homes at least twice a week and monitors others by satellite.

THE UNIT HAS EVOLVED OVER THE YEARS SO THAT WE ARE PRETTY SOPHISTICATED AND WE HAVE QUITE A BIT OF TECHNOLOGY TO HELP US DO OUR JOBS AND THAT'S ALLOWED US TO MANAGE A VERY DIFFICULT AND CRAFTY POPULATION.

He says there are about 580 sex offenders in D-C assigned to C-SOSA officers.

Jessica Forres WAMU 885 news