The body of 24 year old Andrew Johnson is found inside his home at 1516 3rd Avenue.
Terre Haute police initially responded to the home around 4 p-m on a call of what was believed to be cardiac arrest. Upon arrival police find that Johnson was already deceased.
They also find carbon monoxide levels in the home are extremely high. Everyone was evacuated from the home, which took hours to ventilate.
The investigation is on going. An autopsy for Johnson is scheduled for Wednesday.
Police say this is not a public safety concern as the carbon monoxide is contained within the home.