Dr. Mencias had been appointed Dean of the College of Medicine at the University of Santo Tomas in 1936, and continued in that capacity when war broke out in December 1941 and when the Japanese forces firmed up their occupation of the Philippines in 1942. Throughout this time and the period of guerrilla resistance which followed, Dr. Mencias aided the resistance by secretly treating wounded guerillas and soldiers, both Filipino and American.
Personal life
Bonifacio Lopez Mencias was born on May 14, 1888, in Villasis, Pangasinan. He graduated from Colegio de San Juan de Letran and was an active alumnus who once served on the 1939 Alumni Board. He was married to Barbara Sacro of Batac, Ilocos Norte, and had six children: Rosario, Eleno, Pilar, Margarita, Bernardita, and Ramon. He bought a parcel of land in San Juan, Rizal, in the 1930s, on the corner of P. Guevarra and A. Luna streets, and raised his family there.
Disappearance and presumed death
When the Japanese Kempeitai arrested a nephew of Dr. Mencias' who they suspected of being involved with the guerillas, they found Dr. Mencias' identification card in his possession. Dr. Mencias, already suspected to be one of the underground anti-Japanese guerillas preparing for the coming of the American liberation forces, was picked up by the Kempeitai in late January 1944, and was never heard from again. Dr. Mencias is presumed to have been taken to Fort Santiago and then killed. Some accounts of the event specify that Dr. Mencias was beheaded by the Japanese. His body was never found.
Legacy
Norberto V. Ramos, who served as UST's University Registrar from 1930 to 1980 recounts in his book detailing the history of UST:
"The UST community laments Dean Mencias' demise especially because of the way he died. He was a devoted administrator... Those of us who knew him and had the opportunity to work with him at the University will always remember him as a kind and simple man, deeply religious; and above all, he was never found wanting in the conduct of his public relations."
Luna Mencias Street, a national road traversing the boundaries of and connecting the cities of San Juan and Mandaluyong in Metro Manila, is partly named after Dr. Mencias. The street had originally been named A Luna Street, after General Antonio Luna of the Philippine revolution. After the second world war, it was renamed in honor of Dr. Mencias.