Police recovered the drugs, money and a gun during a search of the couple's home and storage unit.
"All efforts are being made for a peaceful resolution," the sheriff's office said.
The 50-year-old had fired a shot into the air after arguing with his neighbor.
The suspected shooter is in custody.
It happened outside a Thai restaurant in Spring Lake Park.
Multiple victims were reported in the midnight shooting in Spring Lake Park.
The deceased were reportedly brothers.
The 58-year-old man died in a McDonald's parking lot in Spring Lake Park.
He was parked in Spring Lake at the time.