Story by Amy Morrow

Eyewitness News Reporter/Anchor

CHATTANOOGA. (WRCB)-- Police spent the day digging up the backyard of a home in East Chattanooga and they could be closer to solving a cold case.

They're looking for human remains. They say the dig on Tuesday came from new information on a missing person's case that sent them to a backyard on Arlington Avenue.

"At night you can hear everything back there you know what I mean it's really surprising," says Ronnie Allen.

Ronnie Allen says he didn't know what to think when he saw the commotion outside his house. A crime scene unit in his neighbor's backyard and police cars lining Arlington Avenue.

"I think they been doing some digging and I hear some shovels back there. I want know if they found anything," says Allen.

Investigators say they've found bones but it's too early to tell if they're human.

"There's some small pieces and large pieces and they could have had a large dog," says Captain Tim Carroll.

Captain Tim Carroll says they used ground penetrating radar Friday that pointed out what appeared to be a shallow grave on the property of 553 Arlington. 

So what led them there?

"It's just one of these cases of missing persons the investigator had been following up on and led them here today," says Carroll.

Detectives will only say that missing person's case is about 9 years old and it was a male. But they'll say no more until they've determined if what they've uncovered are human remains, a thought that has had Allen racking his brain, trying to remember who could be missing.

"It really messed me up, it don't bother me, bother me, but it messed me up," says Allen.

Investigators called in a forensic specialist from the University of Tennessee at Knoxville's anthropology department.

That person will determine if the bones are human or animal.

Police say they won't release any more details until that determination is made.