A federal grand jury indicted Sergeant Michael Walker, an Army medic, on Wednesday in the fatal stabbing last year of his wife Catherine, the Associated Press reports. Walker is accused of conspiring with his lover to murder his wife and cover it up to look like a burglary.

Michael and Catherine Walker lived in a house at Aliamanu Military Reservation near Honolulu, where Catherine was found dead by her husband last November, her throat slashed.

A few months later, in April, Aisla Jackson was arrested in Indiana on first-degree murder charges in Catherine Walker’s death.

On Wednesday, Jackson testified against Walker in order to take a plea deal, Hawaii News Now reports. According to court documents, Walker left Jackson a key to his home, which Jackson used to enter and kill his wife.

The federal indictment against Walker includes text messages and emails he sent Jackson about wanting to be free of his wife. From the AP:

“I want you so bad!!!” was one text message on Oct. 12, 2014. “If only someone was out of the way!”

In a November email, Jackson allegedly wrote about needing his permission to act: “The anticipation is exhausting. The thrill is faltering. I’m growing impatience, tired and hungry for action.”

He allegedly responded, “The sooner the better.”

Prosecutors say the two discussed carrying out the killing on Nov. 14, 2014, when Michael Walker would be at work. Around midnight, Jackson allegedly entered the home with a key left near the back door, grabbed a knife from the kitchen and stabbed Catherine Walker multiple times in the upstairs bedroom where she slept.

Walker, a health care specialist, has reportedly been deployed once to Afghanistan, twice to Iraq, and has been assigned to Tripler Army Medical Center since 2013.

Photo via Shutterstock. Contact the author of this post: brendan.oconnor@gawker.com.