Southern State Correctional Facility
Southern State Correctional Facility in Springfield. File photo by Elizabeth Hewitt/VTDigger

An investigation into alleged misconduct by Mike Lyon, superintendent of the Southern State Correctional Facility, was determined to be unfounded, the Vermont Department of Corrections announced Monday. 

โ€œLyon will immediately return to his position at the Springfield facility,โ€ according to a department press release. โ€œInterim Superintendent Monique Sullivan will resume her position as Living Unit Supervisor.โ€

The Department of Corrections never specified the nature of the misconduct allegation against Lyon.

Back in April, Lyon was placed on paid leave after the corrections department received a complaint from within the prison, Haley Sommer, a department spokesperson, told VTDigger at the time. 

The investigation was not related to the spate of deaths at the Springfield prison โ€” 12 since January 2022 โ€” according to corrections officials. 

Mondayโ€™s press release from the department said the state Department of Human Resources handled the investigation and found โ€œwitness accounts and documentary evidence disproved the claim of misconduct.โ€

In a statement, Nick Deml, corrections commissioner, called the news a โ€œprime example of a thorough investigatory process working as it should.โ€

โ€œOur Department treats allegations of misconduct with the utmost seriousness, which is why we immediately refer these claims for independent external review,โ€ Deml said in the statement. โ€œIn this case, clear and robust evidence quickly showed the allegation to be unfounded. I am pleased to welcome Superintendent Mike Lyon back to Springfield and have complete faith in his leadership and integrity.โ€

VTDigger's statehouse bureau chief.