Compare and contrast two paragraphs from an article on heroin purity:

“We found people who snorted it lying face-down with the straw lying next to them,” said Patrick O’Neil, coroner in suburban Chicago’s Will County, where annual heroin deaths have nearly tripled – from 10 to 29 – since 2006. “It’s so potent that we occasionally find the needle in the arm at the death scene.”

and

Heroin metabolizes in the body so quickly that medical examiners often cannot pinpoint the drug as a cause of death unless there is other evidence to back it up – say, a needle or a syringe found near the body. Also, many victims use multiple drugs and alcohol, so citing a specific substance is often impossible.