A soldier was allegedly bludgeoned to death at an army base, dismembered with a machete and buried in cement.
Private First Class (Pfc) Vanessa Guillen, 20, was allegedly killed at Fort Hood in Texas, the US, in the armoury room where she worked.
She was last seen on April 22 and her keys, ID, card, wallet and barracks key were found at the army post.
Human remains were then discovered the Leon River in Bell County, roughly 20 miles east of Fort Hood earlier this week – and Ms Guillen’s family believe they are hers.
Twenty-year-old Aaron David Robinson, who has since been identified as the prime suspect, allegedly became enraged after hearing about it.
He is accused of attacking Vanessa with a hammer, attorney Natalie Khawam told the Army Times.
Khawam said Robinson then allegedly contacted his girlfriend “to help him bury her bloody body”.
She added: “At first they tried to set her on fire, but she wouldn’t burn. Then they dismembered this beautiful U.S. soldier’s body with a machete.”
Robinson left Fort Hood on Tuesday and fatally shot himself on Wednesday after officers confronted him.
Cecily Aguilar, 22 – the estranged wife of a former soldier at the base – now faces one count of conspiracy to tamper with evidence in the disappearance.
Prosecutors said the pair tried to dismember the body with a “machete-type knife” before disposing of the remains in three holes.
They allegedly later came back to fill the holes with concrete.
If convicted, Aguilar could face up to a 20-year prison sentence.
Before Guillen went missing, she told her family that she was being sexually harassed by one of her sergeants at Fort Hood.
On Wednesday, Guillen’s sister Mayra said she had met the soldier suspected in the killing.
She said: “When I first went up to that base, that subject, I met him, not knowing that he had something to do with it.
“I felt something was telling me that he did something, and I wasn’t wrong apparently.
“And apparently now, he kills himself. Why? I don’t know.”
She added: “But whoever is responsible has to pay, and we demand a congressional investigation.”
The remains have not yet been identified as Ms Guillen’s.
US Army Criminal Investigation Command Senior Special Agent Damon Phelps said there was “no credible information” Ms Guillen had been sexually harassed or assaulted.
Originally from Houston in Texas, she was a small-arms repairer with the 3rd Cavalry Regiment.
Ms Guillen was posthumously promoted to specialist on Wednesday due to her time in the military.