Stephen Craig Paddock, the man police identified as the Las Vegas shooter, had ties to Florida.
Brevard County property records show he once owned property in Melbourne.
It appears he owned the property from May 2013 to May 2015, when he sold his home to a couple, according to records.
His brother Eric lives in Orlando, according to the Orlando Sentinel, which quoted him as saying he was "completely dumbfounded" by the incident.
The newspaper said he made a statement to police.
Paddock's niece Nicole Paddock lives in East Orlando, according to News 6 in Orlando. A reporter who spoke to her said she was "shocked and disturbed" to learn that her uncle was identified as the gunman.
Stephen Paddock, 64, was found dead in a hotel room with as many as 10 firearms, police said. They think he killed himself before police broke into his room.
Authorities say that 406 people were taken to hospitals and 50 of those are dead, including an off-duty Las Vegas police officer. His name was not immediately released.
The Associated Press contributed to this report.
Las Vegas shooter's brother lives in Orlando, 'completely dumbfounded' by massacre https://t.co/mYFS8H4ljL
— lisacianci (@lisacianci) October 2, 2017
— News 6 WKMG (@news6wkmg) October 2, 2017