South Australia Police have arrested and charged Domenic Perre with murder and attempted murder following a review and additional investigation of the 1994 National Crime Authority (NCA) bombing.

Perre, 61, appeared in a packed Adelaide Magistrates courtroom this afternoon and made no application for bail.

Key points: Domenic Perre has been charged with murder for a second time over the NCA bombing

Domenic Perre has been charged with murder for a second time over the NCA bombing Police said his arrest follows a two-and-a-half year investigation

Police said his arrest follows a two-and-a-half year investigation Detective Sergeant Geoffrey Bowen was killed in the blast in March 1994

Detective Sergeant Geoffrey Bowen was killed in the blast in March 1994 Perre was initially charged but the case was dropped months later

Detective Sergeant Geoffrey Bowen — originally from Western Australia — was killed in the blast at the NCA office on Waymouth Street, on March 2, 1994.

Lawyer Peter Wallis also suffered severe injuries.

At a media conference on Thursday afternoon, assistant police commissioner Scott Duval said technology and the help of international forensic experts were among the factors that led to the arrest.

Domenic Perre during the 1990s. ( ABC News )

He said police had gone to the "ends of the earth" in their investigation, but could not comment on whether new witnesses had come forward.

"We're extremely confident we can prove these allegations. Certainly, this has been a very comprehensive review and investigation, and we have certainly appreciated the support of the Director of Public Prosecutions," he said.

"As best we can, we've compiled a brief of evidence that we believe will support the charges.

"We are giving this, far and above, our best opportunity."

Speaking on behalf of Mr Bowen's family, his brother-in-law David Gorton thanked the police agencies involved for their efforts.

"The second of March, 1994, saw our lives devastated in a way unimaginable, with the sudden, unjustified and abhorrent death of a husband, father, friend and police officer, Geoff Bowen," he said.

"Despite the life sentence that was imposed upon Jane, Matt and Simon, and the extended Bowen family that day, we have never lost sight of justice.

"We wish for the judicial process to take its course unimpeded."

Geoffrey Bowen was killed at the NCA Adelaide office in March 1994.

Investigation has lasted more than two years

The case has been under review since September, 2015.

"Today's arrest follows a two-and-a-half year investigation by SA Police, the Australian Criminal Intelligence Commission and Forensic Science SA, along with a review of the evidence gathered by the Director of Public Prosecutions," a police statement said.

Domenic Perre (left) in handcuffs in custody after his arrest. ( ABC News )

"Task Force Cornus led by the SA Police Major Crime Investigation Branch has been active ... reviewing the case and pursuing new lines of inquiry," the statement said.

"Anyone with information about the bombing should call Crime Stoppers on 1800 333 000."

Assistant commissioner Duval said it was coincidence that today's arrest occurred a day before the 24th anniversary of the killing.

WA Police Union president George Tilbury said today's arrest meant a lot to WA Police officers.

"At the time, the death of Geoffrey Bowen rocked the WA Police Family and 24 years later, it is a major achievement to have someone charged," Mr Tilbury said.

"I want to congratulate all of the investigators involved for never giving up."

Police said a $1 million reward remains on offer to anyone with information leading to a conviction.