The answer to 'how did inspection get in my house' is that pests like rodents, insects, or other animals may have found a way into your home. Common causes include cracks, holes, or openings in the home's exterior, as well as improperly stored food or other attractants. Signs of an infestation may include droppings, nests, or damage to your home.
If you suspect a pest problem, it's best to call a professional pest control technician to properly inspect, identify the issue, and recommend the best treatment. While some minor DIY pest control may be possible, many infestations require specialized knowledge and tools to fully address the problem and prevent future issues.