Army Crime Report, FY2018

The U.S. Army Provost Marshal General's FY2018 Army Crime Report (Sept. 2019) is available here. The page devoted to corrections observes:

5. Army Corrections 

In FY2018, Army correctional facilities handled a total of 91 pre-trial prisoners (56 were Army pre-trial prisoners), in-processed a total of 372 prisoners (306 were Army prisoners), and released a total of 415 prisoners (337 were Army prisoners). As of September 2018, there were 604 Army Prisoners incarcerated within DoD correctional facilities, 189 in federal correctional facilities, 92 on mandatory supervised release, and 192 on parole. As illustrated in Figure V-5 [omitted here], a disproportionate number of Army prisoners are junior Soldiers (E1-E4). Junior Soldiers composed 65% of the prisoner population despite reflecting 41% of the AD [active duty] population. Also, a disproportionate number of prisoners are male (99%) compared to their AD population size (84%). 

In FY2018, 58% of the Army prisoner population’s primary confining offense was sex crimes and 35% for other violent crimes. Of the sex crimes, 44% were against adult victims and 56% against children. Of the violent crimes, 68% were for murder, 18% for assault, 10% for child pornography, and 4% for other violent offenses (e.g., robbery, kidnapping). 95% of the population have a sentence length of one year or more and 3% of the population have a life sentence. 85% of those serving a life sentence were convicted of murder and 15% were convicted of other crimes (e.g., rape, aiding the enemy).