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FLORA, Ind. – The chief of the Flora Fire Department stepped down Tuesday, sources tell CBS4.

Chief Adam Randle’s resignation comes just one week before the one-year anniversary of the house fire that killed four young sisters, Keyana, Keyara, Kerrielle and Kionne.

Investigators have said that they believe the fire was intentionally set, but there have been no arrests made in the case.

Adam Randle isn’t the first investigator connected to this unsolved case who has recently resigned.

Back in June, a fire investigator assigned to the case, Adam Randle’s father, Dennis Randle quit his job. Dennis Randle was the fire investigator for the Indiana Department of Homeland Security. Dennis Randle was in charge of the Flora investigation.

CBS4’s Aishah Hasnie exposed problems with the state’s findings, including the initial claim that accelerants were all over the house. Accelerants were actually only in one spot. A day later, Dennis Randle resigned.

Earlier this week, it was announced that Carroll County Prosecutor Rob Ives would be retiring at the end of the year with a year left in his term. He says he made the decision for private and personal reasons. Ives’s retirement comes as the Flora case and the Delphi investigation into who murdered Abby Williams and Libby German remain unsolved.

NAACP leaders recently voiced their concerns about how Indiana State Police are handling the investigation, accusing the agency of trying to cover up missteps.

Randle’s resignation is effective immediately and we’re told the announcement came at a regularly scheduled Flora Fire Department meeting. When CBS4 asked Flora Fire Department officials the reason why Randle decided to step down, our crews were not given a clear answer.

Randle issued the following statement to WLFI Wednesday night:

In light of the negative press and public attention I felt it was best to release a statement regarding my resignation. My resignation as the Fire Chief and as a member of the Flora Fire Department was a personal decision. At this time, my attention needs to be focused on my family and their needs. It is my hope that it is understood that this was a very difficult decision to make. I hope to have the opportunity to once more serve the community that has stood behind and supported Public Safety. It is unfortunate that our small community has endured several tragic events in a short time span. Firefighting and EMS are a profession I care deeply about. I have sacrificed and dedicated countless hours and missed numerous events in the lives of my children.. I believe it is time for me to dedicate myself more to them. The Flora community and Flora Fire Department are still in great and capable hands with my departure. The Flora arson investigation has, and always will, weigh heavily on myself and all other First Responders that dealt with the traumatic scene that night. The investigation is not at all a factor in my decision to resign. It is my hope that one day this case will be solved and justice be served. The Indiana State Police and Indiana State Fire Marshals have an opportunity and obligation to work together to find justice for the family and all first responders involved in the tragic event.

Indiana State Police issued the following statement in response to Randle’s resignation:

“Regardless of who the prosecutor or fire chief may be, the Indiana State Police will continue following all leads related to the Flora fire and Delphi investigations.”