In an example, an apparatus includes a biological analysis component and a control component. The biological analysis component is configured to obtain an expected biological sample value. The expected biological sample value indicates an expected concentration of a material biologically processed by a courier. The biological analysis component is further configured to determine whether a measured biological sample value is associated with the courier based on a comparison of the expected biological sample value to the measured biological sample value. The control component is configured to perform a first set of operations based on the result of the comparison indicating that the measured biological sample value is associated with the courier. The control component is configured to perform a second set of operations based on the result of the comparison indicating that the measured biological sample value is outside an acceptable range of the biological sample value.