By Daily Mail Reporter and Associated Press

PUBLISHED: 14:22 EST, 1 July 2013 | UPDATED: 15:51 EST, 1 July 2013

A rogue U.S. Army soldier convicted of forming a violent anti-government militia sent his lover a text message saying that they would have 'plenty of money' just hours before murdering his wife and killing their unborn child, investigators told a court marshal today.

Investigators believe Private Isaac Aguigui used a stranglehold or 'some type of smothering' to kill Army Sergent Dierdre Aguigui in July 2011 at the couple home on Fort Stewart, Georgia. The 24-year-old was nearly eight months pregnant when she died.

Isaac Aguigui then allegedly used the $500,000 life insurance payout to fund his militia, F.E.A.R. - short for Forever Enduring Always Ready - which stockpiled assault weapons and bomb components and discussed plotting attacks on a crowded landmark in nearby Savannah or poisoning the apple crop in Washington State and even assassinating President Barack Obama.

Her husband wasn't charged with her killing until this past April, when a second look by a medical examiner for the Georgia Bureau of Investigation concluded someone killed the woman by choking her or otherwise blocking her airway, Kapinus said.

'By the evidence it can be classified either as a stranglehold or some type of smothering,' Kapinus said.

The investigator said about eight hours before Aguigui's wife died, he had sent a text message from his cellphone to an old girlfriend that said: 'We'll have plenty of money.'

Lieutenant Colonel Kristin Brown, an Army obstetrician who treated Aguigui's wife during her pregnancy, testified that she had complained that her husband had been unfaithful and that they planned to get a divorce. Investigators also learned that Deirdre Aguigui had sought confidential counseling for domestic abuse.

Isaac Aguigui's defense attorneys insisted that while there was evidence he cheated on his wife, prosecutors had little proof that he killed her.

Captain William Cook, an Army defense attorney, said the death of Aguigui's wife was 'still a mystery.'

Authorities jailed Isaac Aguigui nearly eight months after his wife's death, but for a different crime. On December 5, 2011, fishermen found the bodies of former Army Private Michael Roark and his 17-year-old girlfriend, Tiffany York, in the woods of rural Long County near Fort Stewart. Both had been shot in the head just two days after Roark was discharged from the Army.

Investigators arrested Aguigui and three other soldiers - Sgt. Anthony Peden, Pvt. Christopher Salmon and Pfc. Michael Burnett - and charged them with the deaths about a week after the bodies were found.

Burnett turned on the others last summer. In a plea deal with civilian prosecutors, he agreed to testify that Aguigui led an anti-government militia group he'd formed inside the military called F.E.A.R. - short for Forever Enduring Always Ready.

Burnett said Aguigui had Roark and his girlfriend killed because he was leaving the Army and they knew too much about the group. Roark's father has said Aguigui would give his son money to buy weapons for the militia. Burnett testified that he saw Peden and Salmon shoot them in the head after leading them into the woods at night.

In all, at least 11 suspects – most of them current and Army former soldiers – have been arrested in connection with the militia group on charges ranging from theft and drug dealing to murder. But none have been charged with committing or plotting acts of terrorism.