Final answer:
The rear portion of the Old Minnehaha County Jail served as a holding area for juvenile offenders until their release.
Step-by-step explanation:
The rear portion of the Old Minnehaha County Jail served as a holding area for juvenile offenders whose stay at the jail would be brief before their release. When the jail became overcrowded, the courts would send the juvenile offenders to local fairgrounds until they could be released. At the fairgrounds, the kids would sleep on cots and sing freedom songs to encourage each other.