Leo Ruyters was deputy Chief Controller of the C.C.D. (The Centrale Controle Dienst, Central Control Service, 1934-1954, mainly supervised trade in scarce goods. ) Member of the resistance group Bouman, who supported downed Allied air crews and escaped prisoners of war to get to safety.
“Leo Ruijters and Leendert Brouwer, employees of the CCCD, had pamphlets illegally printed before the strike, urging companies and employees to lay down work." 
Arrested on May 1, 1943, for calling a miners’ strike and sentenced to death. The next day he was executed at the Hamertse Hei.
Buried in the municipal cemetery on Tongerseweg, Maastricht, grave R 21b 
See also the article: “When the miners strike against the German occupiers” 
Biography at www.struikelsteentjes-maastricht.nl. 
Monument Pro Patria, Heer