COLUMBIA, S.C. — News 19 is continuing our investigation into the Columbia Housing Authority (CHA) more than two months after the deaths of Calvin Witherspoon and Derrick Roper.

This week we received the employee file of Gilbert Walker, CHA executive director. Walker has been with the housing authority for 50 years and is set to retire at the end of June.

While he has served in different roles within the authority, letters of concern popped up in his file during his time as the Deputy for Housing Management in the early 1990's.

Former executive director Rodney Fauser, who served from 1990-2000, wrote several letters of concern, criticizing Walker's ability to manage staff.

In a letter from September 23, 1992, Fauser said he was concerned after staff under Walker failed to collect rent and complete inspections, writing: 

"There is no excuse for the apparent failure of your oversight responsibility. After a thorough investigation of why this occurred, I can only reach the conclusion that the reports necessary for you to monitor team progress were in place and you simply ignored them."

A letter from September 25, 1997 highlights Fauser's concern about the readiness of apartments for new residents, writing that the condition of the apartments was "totally unsatisfactory." In the same letter he wrote "what actions like this tell me is that you and your staff care nothing for our residents."

"Basically, people could do things with no accountability," says Fauser. "So, what you had to do, was frequently sit folks down and explain to them again, they're out of a job if they don't do it and then when you do fire them you get holy hell."

Despite his concerns with Walker, the annual reviews reflected positive feedback, including receiving "substantially exceeding requirements" for several annual reviews.

When asked about Walker's performance reviews compared to the letters of concern, Fauser said that Walker's influence in the community played a big role in his decisions.

"I was set to take fault too," says Fauser. "Because I put up with a lot of it and I shouldn't have and in retrospect I was stupid for doing it."

OUR PROBE:

In our investigation, we've uncovered previous maintenance problems in the units at Allen Benedict Court, that showed there were concerns about the units well before January 17th. We have a mountain of documents related to the case, as well as interviews with residents, and we continue to present new information each day.

You can see more into our probe below: 

RELATED: Four years of Allen Benedict Court inspection reports released

RELATED: DEEP DIVE: Work orders highlight potentially life-threatening problems at Allen Benedict Court

RELATED: Deep Dive: Work orders for deceased resident's apartment

RELATED: History of issues at Allen Benedict Court Apartments

RELATED: Allen Benedict Court records show possible lack in maintenance

RELATED: Incident report reveals possible source of CO in Allen Benedict Court deaths

RELATED: 'Maybe they care, maybe they don't' Columbia Housing resident speaks out about maintenance issues

RELATED: EMS radio recordings describe moments after man was found in his apartment at Allen Benedict Court

RELATED: Fire Department: At least 7 calls for 'suspicious odors' in 2018 at Allen Benedict Court

RELATED: Allen Benedict Court work orders show history of maintenance issues at deceased resident's apartment

RELATED: 'It takes a toll': Allen Benedict mother, daughter adapting to new normal

RELATED: 'I was in the belly of Hell': ex-Allen Benedict Court resident describes living there

RELATED: Previous work orders show gas leak issues at Allen Benedict Court

LAWSUITS: 

There have also been multiple lawsuits filed in connection to the case. You can see our coverage of those below.

RELATED: First lawsuit filed against Columbia Housing Authority director, commission chair

RELATED: Lawsuit alleges Allen Benedict Court Resident suffered from 'gas poisoning' well before evacuations

RELATED: Two new lawsuits filed over death, injury at Allen Benedict Court apartments

RELATED: 'Grossly negligent': 1st lawsuit filed over conditions at Allen Benedict Court Apartments