OHELP WITH FUNERAL EXPENSES. >> 12 NEWS HAS NEW VIDEO, TONIGHT, SHOWING THE MOMENTS JUST BEFORE A CRASH INVO THE MOTORCADE FOR DEMOCRATIC VICE PRESIDENTIAL NOMINEE TIM WALZ. THIS IS THE VIDEO. MILWAUKEE COUNTY SHERIFF'S OFFICE IS INVESTIGATING THE CRASH ON 794 NORTHBOUND, JUST OFF THE LAYTON AVENUE EXIT. THREE VANS WERE IN THAT CRASH, CARRYING CAMPAIGN STAFF AND REPORTERS. 12 NEWS POLITICAL DIRECTOR MATT SMITH JOINS US LIVE. MATT, YOU AND PHOTOJOURNALIST BOB PALMER WERE TWO OF THE JOURNALISTS ON THOSE VANS. REPORTER: THAT CRASH HAPPENING RIGHT HERE, AS TONIGHT INVESTIGATORS ARE NOW WORKING TO DETERMINE HOW VEHICLE GOT ENTANGLED INTO THE MOTORCADE AND WHETHER TRAFFIC SHOULD HAVE BEEN MOVING IN THE FIRST PLACE. TONIGHT NEW DEPARTMENT OF TRANSPORTATION VIDEO SHOWING THE MOMENTS BEFORE THE CRASH TRAFFIC FREE-FLOWING NORTH ON 794 INCLUDING THE ONE VEHICLE INVOLVED. JUST MOMENTS AFTER DRIVING OUT OF CAMERA VIEW AND UNDER THE LAYTON AVENUE BRIDGE THE CHAIN REACTION CRASH. >> ARE YOU GUYS HURT? OUR CAMERAS CAPTURING THE IMMEDIATE AFTERMATH AND THAT VEHICLE NOT PART OF THE MOTORCADE ENTANGLED IN THE MIDDLE OF IT ALL, NO ROLLING INTERSTATE CLOSURE AS THE MOTORCADE ENTERED 794. VEHICLES STILL DRIVING BY JUST SECONDS AFTER THE CRASH. THE FRONT OF THE MOTORCADE CARRYING DEMOCRATIC V.P. NOMINEE TIM WALZ ABLE TO CONTINUE MOVING TO THE SUMMERFEST GROUNDS THE CRASH THERE AT THE TOP OF THE SCREEN. >> WERE YOU CONCERNED THE INTERSTATE WAS NOT CLOSED YESTERDAY ON TIM WALZ'S MOTORCAD? >> NOT NECESSARILY. WE WORKED WITH THEM AND DID EVERYTHING THAT WE WERE ASKED. I THINK IT WAS AN ACCIDENT AND ACCIDENTS DO HAPPEN. REPORTER: TONIGHT 12 NEWS HAS LEARNED THE U.S. SECRET SERVICE DID NOT REQUEST A FULL FREEWAY CLOSURE BUT IT'S STILL NOT CLEAR WHETHER A ROLLING OR TEMPORARY CLOSURE SHOULD HAVE HAPPENED WHEN THE MOTORCADE ENTERED 794. SHOULD TRAFFIC HAVE BEEN CLOSED THOUGH ON 794 DURING THAT MOTORCADE? >>WE OFFERED EVERY OPPORTUNITY FOR THE SS TO DO WHAT THEY WANTED TO DO SO IT'S UNFO IT HAPPENED, BUT FOR THE STATE AND CITY WE WORKED WITH THE FOLKS THAT WERE TAKING CARE OF THE TRANSPORTATION AND THEY GOT EVERYTHING THEY ASKED FOR ON OU PART. DERIICK: MATT, AS THIS INVESTIGATION UNFOLDS, WHAT QUESTIONS REMAIN TONIGHT REPORTER: TRAFFIC HAS BEEN TEMPORARILY CUT OFF WHILE THE MOTORCADE WAS HERE 794. BROADER CONCERNS HOW CLOSE THEY