The shooting happened off Green Valley Road around 1:00 p.m.
"Call the cops. I killed him. He's over there on the ground."
Police say he shot his brother "during an altercation."
The department opened the doors to the newly built police headquarters Friday morning.
The Jeffersonville Police Department began investigating Eva Massage at 1002 E. 10th St. after receiving tips from the community.
New Albany Police Chief Todd Bailey said officers arrested 54-year-old James B. Cook Sunday.
The New Albany Police Department said it happened just before 10 p.m. near The Earl on 108 East Market Street.
The Louisville 20-year-old is behind bars, but is not charged with the murder of 18-year-old Bryce Gerlach.
The other two victims wounded in the shooting, a 22-year-old man and a 42-year-old female, are still recovering at the hospital.
Isaac Conner Summers was charged with murder (complicity) after being arrested on Monday.