Ninjas?

Sensational crime lede du jour:

The murders of Byrd and Melanie Billings, parents of 17, were made more bizarre by the ninja garb worn by the killers. Now Rick Outzen reports that these ninjas might have struck before. [Daily Beast]

The author mentions "ninja garb" several times and speculates that a ninja crime wave is sweeping the Florida panhandle. But he doesn't explain what he means by the "bizarre dress of [the] executioners as Japanese ninja warriors."

I'm going to assume he means black ski masks and black clothes. What else would you wear to a home invasion?

I'd take notice if the assassins used swords or throwing stars, but according to media reports they used guns.