Mount Prospect has a steady mix of daytime foot traffic and suburban commuting—so elevator and escalator use is routine. When a device malfunctions, the window for preserving key evidence can be short. Security footage may be overwritten, maintenance vendors may only keep records for limited periods, and reports can get “lost” across property management and subcontractors.
Waiting can make it harder to show:
- what the device was doing right before the incident,
- whether there were prior issues or repeated complaints,
- and whether reasonable maintenance and inspections were performed under the building’s system.


