Carol Lillig, who lives nearby, said she often heard people arguing in the home and sometimes with neighbors.
"They fought all the time," she said. "It was a constant."
Lillig said the men, whom she didn't know well, moved to the home about six months ago.
Mhango was booked into the Brevard County Jail on charges of second-degree murder and aggravated battery. He's being held without bail.
The stabbing remains under investigation.
No other details were given.