So I'm reading a book on my family history written by my uncle, and in this book he recalls his father taking him onto the rooftop of their flat in Brussels on Rue de Douvres. His father was a member of the Belgian Resistance under General Jules Pire and the recipient of a medal of a roaring lion flanked by a laurel wreath with a valor device.

On this particular evening, his father told him of a plan that they had devised for that evening concerning the Palaise de Justice, which the Gestapo was using to store all their files on Belgian citizens. The plan was to send a team of men from the resistance to the palace feigning drunkenness, overpower the guards, work their way to the center of the dome and light the records on fire. He remained on the rooftop until later that evening he could see the flames ignite the sky.

I know this is a firsthand account to a degree, but to what extent do historical records collaborate this story? According to Wikipedia the fire was started by a retreating German Army.