Investigators are trying to determine whether there's an environmental link that might explain why the babies died in on post housing.
The focus has been on drywall in the homes.
One family shared test results with the I-Team showing their drywall tested positive for sulfur off-gassing.
Fort Bragg then pointed toward additional tests with different parameters, which came back negative for sulfur.
So far, testing done for local investigators has not revealed a problem with the drywall.
For now, no one is living in the homes where the babies have died.
While Fort Bragg says it feels confident the houses are safe, they're waiting on results from a federal investigation to be sure.
There are 263 pages of documents about the investigation. If you would like look at all of the documents click here.