Milwaukee fire officials confirmed that a body was found Wednesday, the day after firefighters battled a structure fire.
Fire Chief Aaron Lipski told Fox6Now.com that crews conducted "multiple searches" in the "all accessible areas" of the home, which was filled with debris.
Lipski added that conditions were "nearly impossible given the extreme hoarder conditions throughout the building."
Officials said the man was 70 years old.
"We do not make that statement lightly," Lipski said. "We scrutinized all areas where firefighting took place, considered the location of the deceased person, and have reviewed the available evidence."
An investigation is underway on the cause of the fire.
