From the article:
[T]he Department of Justice (DOJ) is pursuing an unusual legal strategy to compel cellphone makers to assist investigations.
In both cases, the seized phones—one of which is an iPhone 5S—are encrypted and cannot be cracked by federal authorities. Prosecutors have now invoked the All Writs Act, an 18th-century federal law that simply allows courts to issue a writ, or order, which compels a person or company to do something.
Some legal experts are concerned that these rarely made public examples of the lengths the government is willing to go in defeating encrypted phones raise new questions as to how far the government can compel a private company to aid a criminal investigation...
The two orders were both handed down on October 31, 2014, about six weeks after Apple announced that it would be expanding encryption under iOS 8, which aims to render such a data handover to law enforcement useless. Last month, The Wall Street Journal reported that DOJ officials told Apple that it was "marketing to criminals" and that "a child will die" because of Apple’s security design choices...
But, if Apple really can’t decrypt the phone as it claims, the point is moot.