than 6,000 acres numerous witnesses first spotting flames at a shed near there, quickly picked up by hurricane force winds. in the video the smoke was very light and then it just progressed so fast. reporter: investigators say it is too early to tell whether the shed was the exact ignition point. sheriffs deputies executing a search warrant over the weekend, but won t say where. we haven t eliminated or honed in on any one specific thing. it s an open investigation. reporter: while snow helped nearly extinguish the marshall fire, it is now a challenge for investigators who are trying to uncover evidence around the cause of the blaze and, lester, there is more snow on the way. also tonight, new subpoenas have been issued for ivanka trump and donald trump jr new york attorney general letitia james wants their testimony and documents as part of her civil tax fraud investigation into the trump organization james also wants to depose former president trump. trump has blasted the i