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DES MOINES, Iowa– A Newton family says the 2011 death of their loved one in Dallas County was no accident.

Gregg Nimmo, 44, was found with severe head injuries on a gravel road in Dexter more than three years ago. His family says authorities don’t have enough evidence in the case to charge anyone with a crime.

“I feel like somebody got away with something,” said Linda Cook, Nimmo’s older sister.

The family is turning to well-known forensic pathologist, Dr. Cyril Wecht, for help. Wecht has been featured on shows like Dateline and 48 Hours.

“I think this doctor will be able to figure out what happened and I just want the truth,” said Cook.

The possibility of finding the truth won’t come cheap. The family hosted a potluck and auction Sunday to raise the $5,000 needed to hire Wecht to look at the case.

“My main goal is just to help lift the spirits. Just show them, man, there’s people out there that we don’t even know you, but we care,” said Clem Vestal.

Vestal helped organize the fundraiser for Nimmo at Maingate Bar and Grill.

The family also set up a fund at US Bank. Donations to the “Justice for Gregg and Son” account can be made at any branch.