1. Surveillance Footage

Security cameras can show:

• How long the hazard existed
• Whether employees passed by without addressing it
• Whether warnings were posted

For example, if a spill was on the floor for 45 minutes before a fall, this strongly supports constructive knowledge.

2. Incident and Maintenance Records

Businesses often keep logs of:

• Cleaning schedules
• Repairs
• Prior incidents

If records show that the hazard was previously reported or repeatedly ignored, this can prove actual knowledge.

3. Witness Testimony

Witnesses may confirm:

• The hazard existed for a significant period
• Employees were aware of it
• No warning signs were present

Independent testimony adds credibility and can fill gaps in documentation.

4. Photos and Physical Evidence

Photos taken immediately after the incident can demonstrate:

• The condition of the hazard
• Whether warning signs were missing
• The severity of the dangerous condition

The condition itself (e.g., dried spill, accumulated debris) may indicate how long it existed.

5. Inspection Policies and Procedures

Property owners are expected to conduct reasonable inspections.

If a business:

• Has no inspection policy
• Failed to follow its own procedures
• Cannot show records of inspections

…this can support a claim of constructive knowledge.

6. Prior Complaints or Similar Incidents

Evidence of previous incidents involving the same hazard can demonstrate:

• The owner was aware of a recurring problem
• The risk was foreseeable

This is particularly important in cases involving:

• Repeated spills in the same area
• Ongoing structural issues

Poor lighting or unsafe design