January 1, 1950
A case once was solved by the accidential appearance of an invisible message – written with lemon juic. the paper had been laid on a hot radiator and heat brought out the lemon-juice writting
January 8, 1950
A murderer once used rifle ammunition in a revolver by filing down the cartridge case. A file in his possession contained particles of the same metal. Conviction Followed
January 15, 1950
A torn piece of cardboard found at the scene of a crime fitted perfectly into a match cover found in possession of a suspect and solved a case.
January 22, 1950
For study and comparison purposes fingerprints frequently can be "lifted" by transparent cellulose adhesive tape.
January 29, 1950
A chip of paint found at hit-and-run scene can be ground and the cross-section compared with paint sample from suspect car. Paint layers establish identification.
