A number of other G4S officers “liked” the post, and Manus staff continued to joke about the incident.

“I want to be his escort to the shitter when he passes them,” posted Jason Drain, another employee at the centre. Lol so he has finally realised the food is shit,” posted Paul Clear, who was also a G4S employee."

Powell replied in a later post that “Docs think it may take up to a month” for the asylum seeker to pass the clippers.

G4S launched an investigation after Guardian Australia raised the posts with the Immigration Department. Drain has since posted on Facebook that he was sacked, but G4S would not confirm the circumstances of the other two employees’ departures.

“G4S has concluded its investigation into allegations of misuse of social media platforms by some personnel based at the Manus Island offshore processing centre,” G4S said in a statement.

“We found that a small number of personnel had directly or indirectly breached our strict policies on duty of care and social media use by commenting on a serious self-harm issue on their personal Facebook accounts. The actions of these individuals are completely unacceptable to G4S and have been dealt with swiftly.

“The individuals who were found to have breached our policies will no longer be employed by G4S.” The statement also said G4S would continue to review its training programs and monitor social media.

The Australian navy has also launched an investigation into inappropriate social media use by its personnel, after Fairfax media reported on links to racist Facebook groups.

Allegedly, KBR made claims to the government, knowing them to be false, under a contract with the Army to provide wartime logistical support, known as the Logistics Civil Augmentation Program (LOGCAP) III. The award of LOGCAP III paved the way for the company to become a critical source for logistical support services in Iraq, which included transportation, maintenance, food, shelter and facilities management. KBR performed many of these services through subcontracts awarded to foreign companies local to the region, such as La Nouvelle and First Kuwaiti.

In its complaint, filed in federal court in Rock Island, Ill., the government alleged that, in 2003 and 2004, KBR employees took kickbacks from La Nouvelle and First Kuwaiti in connection with the award and oversight of subcontracts awarded to these companies. KBR then claimed reimbursement from the government for costs it incurred under the subcontracts that allegedly were inflated, excessive or for goods and services that were grossly deficient or not provided. For example, KBR allegedly awarded La Nouvelle a subcontract to supply fuel tankers for more than three times the tankers’ value. La Nouvelle later rewarded the KBR employee who awarded the subcontract with a $1 million bank draft. As another example, KBR allegedly continued to make monthly lease payments to First Kuwaiti for trucks KBR had already returned to the subcontractor. KBR billed the government for the costs of both of these subcontracts. The lawsuit also alleges that KBR used refrigerated trailers to transport ice for consumption by the troops that had previously been used as temporary morgues without first sanitizing them.

“Our office investigated the actions of KBR and related companies, as well as certain KBR employees,” said U.S. Attorney for the Central District of Illinois Jim Lewis. “We were able to obtain criminal convictions against several subcontract managers whose actions were illegal and caused damage to our military, and we are now committed to pursue these civil claims against the companies themselves.”

The U.S. Attorney’s Office in Rock Island has convicted 10 companies and individuals in connection with wartime contracts in Iraq. The convictions include three KBR subcontract managers who admitted taking kickbacks or making false statements in connection with the allegations made in the government’s complaint. Anthony J. Martin pleaded guilty in 2007 to taking kickbacks in return for awarding First Kuwaiti subcontracts for trucks and trailers and also admitted including the amount of the kickbacks in the price of the subcontracts. In 2005, Jeff Alex Mazon pleaded guilty to making a false written statement in connection with a subcontract for fuel tankers awarded to La Nouvelle in 2003. And in 2006, Stephen Lowell Seamans admitted taking kickbacks from La Nouvelle, during a guilty plea to a kickback arrangement with another subcontractor, Saudi Arabia-based Tamimi Global Co. Ltd. (Tamimi). The government previously entered into criminal and civil agreements with Tamimi in which Tamimi paid the U.S. government $13 million, including $7.4 million for civil claims and $5.6 million in criminal fines, to resolve its liability for the kickbacks.

The government is suing KBR, La Nouvelle and First Kuwaiti under the False Claims Act, as well as the Anti-Kickback Act.

“Contractors and subcontractors are expected to comply with their statutory obligations and act in good faith when dealing with the United States government,” said Special Agent in Charge of the Defense Criminal Investigative Service’s Southwest Field Office Janice M. Flores. “The lawsuit demonstrates the commitment of DCIS and its partner agencies to prevent false billing and corrupt practices involving the military contracting process.”

Some of the allegations contained in the government’s complaint were originally alleged in a lawsuit filed in a federal court in Houston by a whistleblower, Bud Conyers, under the qui tam provisions of the False Claims Act. The case was later transferred to the U.S. District Court for the Central District of Illinois in Rock Island, Ill., where LOGCAP III is administered by the Department of Defense at the Rock Island Arsenal. The False Claims Act authorizes private parties to sue, on behalf of the government, companies and persons whom they believe have falsely claimed federal funds and to share in any recovery. The Act also allows the government to intervene and take over the action, as it has done in this case. The government notified the court earlier this year that it was intervening in Conyers’ case and intended to file its own complaint with additional allegations.

The lawsuit is being handled by the Civil Division of the Department of Justice with investigative support by the Defense Contract Audit Agency, the Defense Criminal Investigative Service and the Army Criminal Investigation Command. The U.S. Attorney’s Office for the Southern District of Texas also participated in the investigation.

The case is captioned United States ex rel. Conyers v. Kellogg Brown & Root Inc. et al., No. 4:12-cv-04095-SLD-JAG (C.D. Ill.). The claims asserted in this case are allegations only; there has been no determination of liability except to the extent of admissions made in the criminal proceedings. USDOJ - http://www.justice.gov/