When the finger leaving the print is very contaminated,both the ridge surfaces and their "valleys" get filled up,resulting in a smeared appearance with little value as evidence.

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When a finger leaving the print is very contaminated, both the ridge surfaces and their "valleys" get filled up resulting in a smeared appearance. This makes it difficult to distinguish the individual ridge characteristics, rendering the print little value as evidence.

When the Finger Leaving the Print Is Very Contaminated,both the Ridge