The U.S. Marshals Service announced on Friday, October 30, the results of Operation Trick or Treat 4, its fourth annual Halloween-season sweep against non-compliant and fugitive sex offenders. The month-long October operation, run with more than 127 partner law-enforcement agencies and led by the Marshals' Sex Offender Investigations Branch, ended with 197 arrests across the country, the agency said.

Of the 197 people arrested, 114 were taken into custody for failing to register as sex offenders, 57 were sex offenders arrested for other offenses, and 26 were other individuals arrested for various criminal activities, according to the Marshals Service. The agency warned that the operation is not over, and that enforcement efforts in some communities will continue through Halloween itself, on Saturday, October 31.

197Total arrests
4,183Compliance checks
77Counties covered
27States
316Offenders found non-compliant

The arrests grew out of 4,183 compliance checks in 77 counties across 27 states, in which officers went in person to the registered addresses of convicted sex offenders to confirm they actually live where they claim to live. Those door knocks found 316 sex offenders who were not compliant with their registration requirements, including offenders who were not living at their registered address at all. Other checks found offenders violating probation or parole conditions, or breaking Halloween-specific rules, the Marshals said.

"For the fourth year, the U.S. Marshals partnered with law enforcement agencies across the nation to make Halloween safer. I commend our men and women, as well as our partner agencies, who dedicated themselves to this year's operation," said U.S. Marshals Service Director Gadyaces S. Serralta. "Our critical mission to investigate federal sex offender registration crimes and hunt down fugitive sex offenders never stops." Deputy marshals also opened new federal criminal investigations for failure to register, including cases that began with the compliance checks.

One part of a wider Halloween safety push

The federal sweep was one piece of a much wider Halloween compliance effort by state and local agencies. In California, parole agents with the California Department of Corrections and Rehabilitation fan out on Halloween night for the annual Operation Boo, checking on sex offenders who are on parole. Agents from the Auburn office will cover Placer, El Dorado and Yuba counties on Friday night. Under their special Halloween conditions, offenders on parole must stay indoors from 5 p.m. on October 31 to 5 a.m. on November 1, keep porch and exterior lights off, and may not hand out candy or put up Halloween decorations. Last year, about 300 officers, including 250 parole agents, took part statewide and found more than 94 percent of supervised offenders in compliance, while about 35 people were arrested.

In Indiana, the Vanderburgh County Sheriff's Office said it completed its own countywide compliance operation on October 29, ahead of Halloween: deputies attempted 133 sex-offender verifications, positively verified 126 offenders, made 2 arrests and filed 4 failure-to-register reports, with 2 investigations still active. Sheriff Noah Robinson said resident safety is the office's priority. In Missouri, the Cedar County Sheriff's Office, with Stockton and El Dorado Springs police, announced Halloween compliance checks on registered sex offenders throughout the county on October 31, and urged parents to accompany younger children while trick-or-treating.

The law behind the door knocks

The Marshals' role comes from the Adam Walsh Child Protection and Safety Act of 2006, which authorizes the service to help state and local authorities locate and arrest non-compliant and fugitive sex offenders, to investigate Adam Walsh Act violations for federal prosecution, and to help identify sex offenders displaced by a major disaster. Convicted sex offenders in the United States are required to keep their registration - including their home address - current, and failing to register can bring both state charges and a federal case. The Marshals Service describes itself as the federal government's primary agency for sex-offender and fugitive investigations.

Personnel from 37 federal judicial districts took part in this year's operation, including all four California districts, the District of New Jersey, the Northern District of New York, all four Texas districts, the Eastern District of Washington, the Northern District of Illinois, the Southern District of Indiana and districts in Florida, Georgia, North Carolina, Ohio, Nevada, Arizona and western Michigan. That map covers many of the states and metro areas where Punjabi and other South Asian families live and where children will be out trick-or-treating on Saturday night - from California's Central Valley to Edison and Jersey City in New Jersey and Houston and Dallas in Texas.

What families should know

The Marshals Service says Operation Trick or Treat 4 enforcement continues in some communities through Halloween, October 31. Parents can check their state sex-offender registry for their neighbourhood before trick-or-treating, and local sheriffs are urging families to accompany younger children and stay on lit streets.

What happens next: the 197 arrested now face state or federal court processes on the charges against them, and the new federal failure-to-register investigations opened during the checks will move toward possible prosecution. An arrest is an accusation, not a conviction, and each case will be decided in court. Halloween-night conditions, including California's Operation Boo rules, remain in force through the night of October 31 into the morning of November 1.