The Zodiac Killer's Hood

Origin
The Zodiac Killer was a serial killer who operated in northern California in the late 1960s and early 1970s. The killer's identity remains unknown. The Zodiac murdered victims in Benicia, Vallejo, Lake Berryessa, and San Francisco between December 1968 and October 1969. Four men and three women between the ages of 16 and 29 were targeted. The killer originated the name "Zodiac" in a series of taunting letters sent to the local Bay Area press. These letters included four cryptograms (or ciphers). Of the four cryptograms sent, only one has been definitively solved.

Effect
This hood was worn by the Zodiac Killer during the killings, and was later discovered by a Warehouse 13 agent working on the case. It was discovered near the scene of the Lake Berryessa Attack. When worn, the user can go unnoticed. Not invisible, but just unnonitced. No downside has been discovered.