Genetic engineering represents the essence of modern scientific developments, rather, it is an essential branch in the contemporary biological revolution, which has become the subject of astonishment and hopes for human life. It plays an effective and influential role in all fields of life, such as science, agriculture, medicine, the environment, animals, and in the field of security and space as well, Therefore, the judiciary tried to benefit from it, And makes it within his service, especially in the field of judicial investigations, establishing lineage and revealing criminal files such as sexual rape, murder and kidnapping, which is done through the use of DNA analyses of human cells known as DNA tests of genetic material as a judicial presumption in order to use it in establishing clear legal, social and legal cases, this is due to the rare and explicit scientific characteristic possessed by the genetic structure of the DNA that is present on chromosomes, the genetic material of all cells of the human body, and it performs the function of inferring a single identity, the personal confidentiality of each individual, which is transmitted through heredity naturally and automatically from both parents for children and grandchildren, it expresses and represents, on its part, the biological characteristics and personal identity of each individual.