He was a spanish jurist, militar and politician. Minister of the Interior between 1942 and 1957, son of Juan Pérez Díaz and Mª del Rosario González Déniz.

After finishing his studied in Law, in 1920, he passed the competitive examination for the Legal Corpus of the Army, assigned to Larache, where he joined the Africanist group. After obtaining his doctorate in 1927, he won the chair of Civil Law of Barcelona where, moreover, he opened his own office. Due to his little empathy with the government of Primo de Rivera he was imprisoned in the castle of Montjüic until the proclamation of the II Republic. After the October Revolution (1934) he participated in the repressive measures because, as he was part of the Legal Corpus of the Army and with the declaration of a State of War, he joined the active service at the Audit of War in the instructed causes against the councilors of the Generalitat and Manuel Azaña. He was reinstated in the university teaching and was appointed Dean of the Universidad de Barcelona in 1935, although the triumph of the Frente Popular in 1936 caused his dismissal, though he was allowed to continue with his classes. He was imprisoned in 1936 and directed to the Checa de San Elías, where he was sentenced to death by a popular Committee, but thanks to his contacts he was released and he escaped to Marseilles with his family. He changed to the national side and joined the Falange in 1937. After the appropriate dismissal without charge, he was appointed Second Head of the Legal Counsel of Headquarters in Burgos that year. He was invested as first prosecutor of the Supreme Court, becoming Chief Prosecutor in 1941, and appointed councilor of FET and of the JONS. He was in charge of the National Delegation of Justice and Law in 1939. In 1941, Serrano Suñer included him among the vocals of free appointment of the Political Board. He took office of the Chair of Civil Law of the Universidad de Madrid in 1941. Apart from coordinating the General Cause against the II Republic, he had a decisive role at the elaboration of the La ley de Responsabilidades Políticas (1939), Ley para la Represión de la Masonería y el Comunismo (1940) and Ley para la Seguridad del Estado (1941). He was appointed Minister of Interior, position he held between 1942 and 1957. After his cease as Minister, he was Parliamentary Attorney, so he worked at the same time at the active service at the Air Force and as General of the Legal Corpus. He stopped his activity as professor due to his retirement in 1968.

Other activities and merits:

Member of the Real Academia de Ciencias Morales y Políticas.

Member of the Real Academia y de Legislación y Jurisprudencia.

He was granted with twelve great crosses, among them the one of Carlos III, Charity, Civil Merit, Aeronautics, Military, Naval, Alfonso X El Sabio, San Raimundo de Peñafort, Isabel la Católica and Cisneros.