Imagine you are a detective examining a crime scene. You are trying to

identify the person who committed the crime, so you collect many samples at

the crime scene. Which sample would be most useful in identifying the

person who committed the crime?

Fingerprints or any type of sample which provides a hint of DNA like hair or skin

Security camera footage, finger prints, any cigarette buds to find their dna ... blood dna if they been injured, hair dna. Bullet casings, the persons phone if they had left it by accident, checking the victim's phone and get a full history report of the victims call locations ... footprint, shoe prints, gun powder residue, glass fragments, carpet fibers