There was a death on Apartment. The victim was identified as Ronit, who recently was married. The police went to the crime scene and they reported the death as a suicide.
Later that day, after the police left, a private detective, hired by the victim's friend who thought it was a murder, searched the crime scene and found a note the police missed.
"4,3: 8,1:_: 9,1: 2,1: 7,4:_: 6,1:9,3:_: 9,1: 4,3: 3,3: 3,2: !"
The detective took out his cell phone and started dialing the police to tell them about his findings.
Once the detective opened the phone to dial, he immediately screamed out, "I SOLVED IT!"
Who was the murderer and how did the detective find out..?