Hawaii island police say they have solved the killing of a 71-year-old man who died nearly two years ago.

Police said today that three men and a woman have been arrested in the death of Dolores Borja Valle, whose body was found in a coffee field off Keopuka Mauka Road in Captain Cook in Kona on Aug. 9, 2015.

Autopsy results determined he died of sharp and blunt force trauma to the head.

Charged with second-degree murder were Holualoa residents Eber Miranda-Garcia, 27; Marlon Miranda-Garcia, 24; Himer Miranda-Garcia, 35; and Jessilyn Lokelani Hoohuli, 32. The three men are brothers.

Police said the arrests followed an extensive investigation, which included recent DNA results.

Hoohuli, Eber and Marlon Miranda-Garcia were arrested Monday. Himer Miranda-Garcia was arrested Tuesday.