Wimunc was first reported missing when she didn't show up for work. Investigators discovered her two bedroom apartment burned and a back window broken out. But her car was still in the parking lot.
Police later said Wimunc was killed at her Fayetteville apartment. Her body was found burned as firefighters put out a brush fire three days later near Camp Lejeune.
According to an autopsy report released in January, Wimunc died from a gunshot wound to the head and her body was dismembered then wrapped in an air mattress and burned before she was found.
Wimunc's estranged husband, Marine Cpl. John Patrick Wimunc, 23, of Camp Lejeune, is charged with first-degree murder.
A local newspaper reported Wednesday that investigators wanted to examine two cell phones, a computer, three cameras and a storage device that belonged to Wimunc.
A search warrant affidavit states that interviews with friends of the Wimuncs showed they communicated frequently by cell phone and computer.
Officials have said the couple was in the process of divorcing.
Another Marine, Lance Cpl. Kyle Ryan Alden, 22, has been charged with assisting John Wimunc in destruction of evidence, burying a body and trying to throw investigators off by offering up a false alibi.
The affidavit said Alden has admitted his involvement.
Detectives also say that the investigation showed Wimunc had filed court a document against a female friend of John Wimunc's after the woman posted photos and messages on the Internet.
Holley Wimunc, who was from Dubuque, Iowa, was a mother of two and a maternity ward nurse at Fort Bragg.