"Everything is unsafe over here," said Minyon Mitchell, a NYCHA resident.

Mitchell has lived in the Linden Houses for six years.

"The elevators are dirty," she said. "The staircases are dirty.  Kids can slip and fall."

NY1 found feces on the wall in the stairwell, mold growing nearby, and paint chipping in the hallway, along with the smell of urine permeating the air.

U.S. Attorney Preet Baharara wants to know if the city lied to the feds about conditions in all city public housing in order to get federal funds.

The investigations are into environmental health and safety conditions and potential false claims for payment submitted by NYCHA to the U.S. related to such conditions in violations of the False Claims Act.

It's part of a civil inquiry regarding individuals with elevated lead blood levels in NYCHA public housing.

Wednesday, a federal judge ordered the city Department of Health to produce the information and documents demanded by the Department of Justice.

The city said it is fully cooperating with the federal investigation.

At the Linden Houses, there is an extensive effort to erect scaffolding related to the upkeep of the buildings.

Mayor Bill de Blasio has invested $300 million to fix the city's aging stock of public housing and catch up with the backlog of complaints.

Federal law requires the city to keep public housing in good repair in order to receive federal funds.

Mitchell says she's complained about her cabinets numerous times, and that NYCHA keeps failing to properly fix her fridge. She's frustrated and welcomes the chance to vent.

"It's not the rubber; I need a new fridge. My cabinets are terrible, you can't even close it, I can't even use the cabinet under my sink," Mitchell said. "What else? Oh man. Let's get it. It's ridiculous."

The mayor's office issued a statement saying, in part, "We will cooperate fully with the investigation. We are concerned about any reports of lead paint, both in NYCHA and in private buildings. New York City has one of the most aggressive efforts in the country to deal with lead paint in older buildings."

"The health and wellbeing of our residents is a top priority," NYCHA said in part in a statement.