About 45% of state prison admissions nationwide in 2017 and 2018 were due to supervision violations of the terms of probation or parole, and in 20 states, more than half of prison admissions were due to supervision violations. Both technical violations (such as missing supervision appointments or failing drug tests) and conviction for new crimes are considered supervision violations. About 23% of state prison admissions were due to technical violations of the terms of probation or parole. About 22% were because the person on probation or parole was convicted of committing a new crime. In 13 states, more than one . . .