The Honolulu Medical Examiner's Office has identified the Good Samaritan who was killed while trying to help a couple as they were attacked in Waikiki.

Ned Nakoa Jr., 58, of Honolulu, died of traumatic subarachnoid hemorrhage due to a blow to the head, according to the medical examiner's office.

Police arrested two teenagers, Benjamin Pada, 18, and Keahi Donovan Acasia, 19, both of Wai'anae. Police have said the pair were attacking a couple at the intersection of Kalakaua and Paoakalani avenues and were trying to steal the woman's purse.

Nakoa allegedly stepped in and tried to help the couple. Nakoa died at 10:30 a.m. Sunday.

The teens have not been charged yet, police said.