Negligent security is a civil legal theory used when an injury happens because security measures were not reasonable for the risk presented. The key question is not whether the property could guarantee safety. Instead, the law generally examines whether the owner or business took reasonable precautions in light of what they knew or should have known.
In New Hampshire, these cases often arise in settings that combine public access with real-world security challenges. Think about older buildings in established neighborhoods, multi-unit housing, and businesses that operate with limited staff. The common thread is that the incident was not random in the legal sense; it was connected to conditions that made harm more likely and that a reasonable operator would have addressed.
The harm might be physical injuries, but it can also include long-lasting effects such as fear of returning to a location, trauma-related symptoms, lost work capacity, and medical costs that continue after the initial emergency. Because the consequences can be both immediate and ongoing, negligent security claims often require documentation and careful explanation.


