CEDAR RAPIDS, Iowa (KCRG) — The Linn County Sheriff’s Office reports Brent Brown, the fourth victim of an attack that killed three others on Wednesday in rural Linn County, has died from his injuries. Johnson County Medical Examiner pronounced Brown dead on Friday. He was 34 years old.

Luke Truesdell is now charged with four counts of first-degree murder. Officials said the attack happened on Wednesday, where police found three people – Romondus Cooper, Keonna Ryan and Amanda Parker – dead in an out building at the 3600 block of East Otter Road in northern Linn County.

Investigators said Truesdell admitted to beating four people with a metal pipe. Truesdell is expected to make an appearance in court on Monday on that new, fourth charge of first-degree murder.

Brown’s body will be transported to the State Medical Examiner’s Office in Ankeny for autopsy. The investigation into this incident continues.