What is the source of the details—personal experience, experiments, scholarly sources, or facts?
Make corrections in punctuation and capitalization in the sentences below.

(1) Look at your fingerprints and you will see small ridges in the skin. The pattern of those ridges is different from anyone else’s fingerprints. Fingerprints never change. If the skin were burned off your fingertips time and time again, your fingerprints would be the same as they were once the skin heals.
(2) There are many different characteristics on each fingertip. Each finger has about 100 different marks. No two fingers on the same hand are alike. No two fingerprints have yet been found to be exactly alike.
(3) Everything that is touched by a person carries his fingerprints. Criminals are captured by the police because their fingerprints are found on objects associated with the crime.
(4) The Chinese were the first people to use fingerprinting thousands of years ago. Today, all countries use fingerprints to identify people. The FBI in Washington has a collection of almost 160 million fingerprints.

Answer:
A concluding sentence belongs at the end of a story, as it dose the concluding paragraph will restate the topic sentence.