How does investigators wearing gloves or using cloth doesn’t erase the fingerprints, whereas criminals erase it by merely cleaning the object.

Question

All the knowledge is based on the movies / tv series, but most of them show such scenarios.

In: 6

Answer 1

The fingerprint is basically an oil residue left on the surface, to “remove” the print all you need to do is smudge it a little so the pattern is unrecognisable, gloves stop a new pattern being laid on top of the existing one. https://youtu.be/FB3Tt2ZLyUQ