Question

During a crime scene investigation, latent prints were obtained from a plastic surface. Which method would have been used by the investigators to detect the latent prints?
A) iodine fuming

B) ninhydrin

C) magna brush

D) silver nitrate

E) adhesive tape

Answer 1

The correct answer is option C, Magna Brush

Plastic is a non-porous surface and usually powder technique is used identify the latent prints on all non-porous surface. The Magna brush technique is used. In this methodology, the powder is spread over the surface and is evenly spread over the surface with a brush. In some recent technologies, the powder is spread though magnetic force. For ensuring better visibility, the colour of the powder must be contrasting to the colour of the surface.