You see a live roach or find a dead one A lack of resources and overcrowding can force roaches to migrate during daylight hours if they want to survive. Finding a dead roach is also an indication of an infestation, especially if it is found in areas where droppings or egg casings have been found.Click to see full answer. Also question is, what to do if you find a dead cockroach? What to Do After Seeing the Dead Roach More dead roaches. Move around and observe carefully for any other dead roaches in the house. Egg or shell casings. Look for oval-shaped casings of recently hatched eggs. Roach droppings. Also, is one roach a sign of infestation? There’s a high tendency that seeing a roach scurrying around means your home is already infested with the little creepy insects. A single roach might not be able to cause significant damage to your property or health; however, a massive infestation hiding somewhere in your home can. One may also ask, why do roaches randomly die? Usually, only cockroaches that have been killed with insecticide die on their backs. This is because insecticide affects the nervous system, causing different enzymes to build up in the cockroach. In nature, cockroaches mostly die as a result of being eaten.How do you know if roaches are gone? Here are several other signs you should look out for: Cockroach activity during the day. An oily, musty smell. Cockroach droppings. Dead roaches. A large number of smaller brown cockroaches in the kitchen and/or bathroom. Keep your kitchen and bathroom clean and dry. Empty any pet food containers.