خفايا بصمات الأصابع

Welcome to BBC Xtra English.

Today Louay and Doug have a story about fighting crime.

Doug's been doing some detective work.

At the scene of a crime, the police often find fingerprints.

These are often used as evidence in criminal cases and to identify the suspect.

Now a group of scientists in the United States say they can get more information from fingerprints than just the identity of the suspect - they can get chemical information.

This is because when you touch something, you leave a fingerprint but you also transfer chemical residues from your skin to the object.

Using a portable device, investigators can determine the health of the person.

They can find out if the suspect has been handling drugs or explosives.

That's forensic science in today's BBC Xtra English.

Are you interested in forensic science? Would you like to be a detective?

هل أنت مهتم بعلم الطب الشرعي؟ هل ترغب في العمل كمحقق بوليسي؟ اكتبوا لنا بالإنجليزية

أنقر هنا للاستماع للكلمات

fighting crime

مكافحة الجريمة

detective work

عمل المحقق البوليسي

fingerprints

بصمات الأصابع

evidence

دليل

criminal cases

قضايا جنائية

the suspect

المشتبه به

chemical information

معلومات كيميائية

chemical residues

آثار مواد كيميائية

portable device

جهاز محمول

forensic science

علم الطب الشرعي

شروط وبنود الاستخدام