FOOTAGE TO SEE WHETHER THE 10-YEAR-OLD WAS BEING SUPERVISED. >>> AND THE CITY HAS A NEW INTERIM POLICE COMMISSIONER TONIGHT, JUST WITHIN THE PAST HOUR. TOM DONLON TOOK THE OATH OF OFFICE FOLLOWING THE RESIGNATION OF NOW FORMER COMMISSIONER, EDWARD CABAN, AMID AN ONGOING FEDERAL INVESTIGATION. MARCIA KRAMER HAS COVERED THE STORY FROM THE BEGINNING, SPEAKING TO ANOTHER MEMBER OF THE ADAMS ADMINISTRATION THAT IS BEING INVESTIGATED. >> Reporter: THE MEN AND WOMEN OF THE NYPD HAVE A NEW SHERIFF IN TOWN, TOM DONLON TAKING OVER, FOLLOWING THE RESIGNATION OF EDWARD CABAN, FALLING BY THE PROBE THAT ALSO INVOLVES HIS TWIN BROTHER, JAMES. CABAN SAYS HE IS COOPERATING WITH THE PROBE, AS THE SCHOOL CHANCELLOR, DAVID BANKS. ANOTHER MEMBER OF THE MAYOR'S INNER CIRCLE TO HAVE THE ELECTRONIC DEVICES SEIZED. HE SAYS HE WAS SHOCKED TO HAVE AGENTS KNOCKING ON HIS DOOR. >> AND ANY TIME ANYBODY WAKES UP AT 5:30 IN THE MORNING AND THEY COME TO YOUR HOUSE, YOU DON'T COUNT THAT AS A GOOD WAY TO START YOUR DAY. >> IF THEY WERE TO COME UP TO YOU AND ASK YOU WHAT'S GOING ON, WHAT WOULD YOUR ANSWER BE TO THEM? >> WHAT I WOULD SAY TO THEM IS THAT IN LIFE, YOU MAY HAVE CHALLENGES, BUT ALWAYS HOLD YOUR HEAD HIGH, LIVE YOUR LIFE, AND WALK WITH INTEGRITY. I'VE ALWAYS DONE THAT, AND I WOULD EARN COURAGE ALL THE KIDS AND TEACHERS, ANYONE ELSE TO DO THE SAME. >> Reporter: EDWARD CABAN MAY HAVE BEEN THE FIRST PERSON TO LEAVE THE EDWARDS ADMINISTRATION, BUT HE'S NOT THE LAST. HE WAS FIRED THIS WEEK AFTER THE OWNER OF THE BAR SAID HE WAS TOLD BY THE AID IF HE NEEDED HELP IN DEALING WITH NOISE COMPLAINTS TO CONTACT THE TWIN BROTHER, JAMES, WHO RUNS A NIGHTCLUB CONSULTING BUSINESS. I'M MARCIA KRAMER, CBS NEWS, NEW YORK. >> AND YOU CAN