I'm a writer, need consultation

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Ela
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I'm a writer, need consultation

Ela
Hello!

I'm writing a sci-fi detective short story. The idea is that the criminal leaves fake fingerprints with the help of plastic gloves, which have a relief model of the fingerprint on them.

Since plastic does not have sweat/grease/whatever on it, the criminal rubbed his nose (with these gloves) to imitate that. His nose is fairly grease, so there's more than enough for it to work.

Is it possible to distinguish between this "nose grease" and the sweat/grease from a real fingerprint when investigating? If so, what are the methods to do so?

Also, if you were to have skin tissue DNA, how much time would it take to match it up with the DNA of a suspect? In general, how would the procedure work?