Crime scene investigators collect and analyze evidence in order to help detectives solve criminal cases.
They analyze crime scenes to determine what evidence should be collected and how, take photographs of crime scenes and evidence, make sketches, record their findings, collect and preserve evidence and reconstruct crime scenes.
Crime scene investigators, sometimes also called criminalists, may also perform lab tests and analyze evidence.
They must be detail-oriented persons with good communication and critical-thinking skills.
A solid understanding of math and science and good problem-solving skills are also needed.