TINKER AIR FORCE BASE — Two airmen accused of conspiring to kill a Jones woman used burner phones to communicate, wrote in coded messages and used several government vehicles to scout out the woman's house, one of the airmen testified Monday morning.

Staff Sgt. Steven Bailey testified Monday at the court-martial of Staff Sgt. Elijah Langhorne, who is accused of attempting to murder Bailey's ex-fiancee, Megan Conrad.

During his testimony, Bailey described a meticulously planned murder-for-hire plot that unraveled a year and a half after it began.

Langhorne is charged with attempting to commit premeditated murder and conspiracy to commit premeditated murder, according to documents filed with the U.S. Air Force Judge Advocate General's Office. He also faces arson charges and charges of using and distributing anabolic steroids. The case is Tinker's first court-martial for attempted murder in at least a decade, base officials said.