TINKER AIR FORCE BASE — An airman accused of conspiring to kill his ex-fiancee pleaded guilty Friday to one count of conspiracy to commit premeditated murder and one count of attempted premeditated murder.

Under a pretrial agreement, Staff Sgt. Steven Bailey will serve 30 years in prison. Bailey was also reduced in rank to airman basic and dishonorably discharged.

In November, Bailey testified that he promised to pay $20,000 to another airman, Staff Sgt. Elijah Langhorne, for killing Bailey's ex-fiancee, Megan Conrad, of Jones. Bailey testified he wanted Conrad dead because he wanted custody of the former couple's daughter, Sawyer Bailey, whom Bailey said Conrad was abusing.

During Langhorne's trial, Bailey testified Langhorne tried several times to kill Megan Conrad between late 2013 and March 2015, including one incident where Langhorne attempted to burn down Conrad's house using an acetylene torch.