It's been nearly two months since members of the University of Michigan chapters of Sigma Alpha Mu fraternity and Sigma Delta Tau sorority caused hundreds of thousands of dollars in damages at Treetops Resorts in Gaylord.

Otsego County Prosecutor Mike Rola has been keeping in close contact with lead detective Michigan State Police Gaylord Post Commander First Lt. Blake Davis as Davis conducts a criminal investigation to determine whether there is just cause to bring about charges.

Rola said that new details have unfolded and he's close to determining whether criminal charges will be filed.

"I've received some additional information (from MSP) and I'll probably have a charging decision by the end of next week," Rola said in a phone interview with The Ann Arbor News.

He did not give specific details about the additional information and multiple

calls to Lt. Davis went unreturned.

In the weeks immediately following the vandalism, MSP Sgt. Jeff Gorno said that officers responding to the resort to kick the students out did not make any arrests because the damage was done and they could not immediately pinpoint the individuals most responsible for the damages.

"Something like that, with that many people, it's difficult to come up with the individuals responsible," Gorno said two weeks ago.

Barry Owens, the general manager of Treetops, said that damages, including lost revenue, out-of-pocket expenses to contractors and third parties for cleaning, extensive repairs, and replacement furniture and fixtures, total about $230,000.

Lost revenue, attorneys and accounting fees, and rebuilding the "damage to the resort's reputation" will cost upwards of $200,000, Owens said.

"The destruction done to Treetops Resort by University of Michigan fraternity and sorority students in mid-January is now near or beyond $430,000. While an investigation is ongoing, the university has stated that they expect the students who are responsible to make full restitution to Treetops for the damages," Owens said.

Alan Greenberg - the president of the non-profit corporation SAM-SI Corp., which owns the house Sigma Alpha Mu students live in - said the fraternity is willing to pay for the damages the members caused, but he questioned the magnitude of the nearly half-million-dollar bill Owens produced.

"They never told us $430,000. He told us that there was approximately $250,000 in hard costs, meaning invoices and bills that they had to pay, and they didn't include any soft costs like lost revenue," Greenberg said.

"We were shocked by that number because Mr. Owens announced several times in public and to the media that the costs were about $125,000."

As a result of the vandalism, U-M officials dismissed SAM from campus and will not recognize it as a Greek organization for a period of four years.

In addition to the university's dismissal of Sigma Alpha Mu, U-M officials have also asked the fraternity's national office to revoke the charter of the U-M chapter and place additional sanctions on the fraternity before it could again become of part of Greek Life on campus.

In the week after the incident, Sigma Alpha Mu's national chapter placed the group on an indefinite suspension, barring it from participating in any formal events.

U-M President Mark Schlissel said he has "profound disappointment" in the actions of these students.

"I want to express my deep appreciation for the Greek Life student leaders who initiated the judicial process and for the university's Student Life team for addressing these situations firmly and fairly through our established process," the president said.

"I hope the broader Greek community can learn from this experience so they can continue to participate in the many positive aspects of Greek Life while avoiding extreme, risky and inappropriate behaviors. It's important that we allow this process to move forward."

Jeremy Allen is the higher education reporter for The Ann Arbor News, covering the University of Michigan, Eastern Michigan University and Washtenaw Community College. Follow him on twitter at @JeremyAllenA2. Contact him at 810-247-4625 or jallen42@mlive.com. Find other University of Michigan-related stories here on MLive.com.