City of Owosso issued the following announcement on Dec 30.
The Michigan State Police Fire Investigation Unit, a MSP K9 unit, as well as Investigators from the Owosso Fire Department were at the fire scene today. They notified us they will need to return in the future to gather more information and continue the investigation.
We look forward to continuing to work with them in the coming weeks and months. We anticipate it may take several months before we have results from the investigation but will continue to provide updates as we work through this process.
Original source can be found here.