Police looking for two suspects who broke into a Boise, Idaho zoo and fatally beat a monkey have a clue: a light gray cap near where the monkey was found.
The hat is emblazoned with a white skull surrounded by swirly drawing and the logo "M L" written on the skull's forehead.
A security guard told officers he spotted two males in dark clothing, one inside the zoo grounds and the other outside the fence near the primate exhibit. When the suspects saw the guard, they ran.
Police searched the 11-acre zoo, including one sweep with a thermal imager, but did not find the suspects.
During the search, officers and zoo employees found a Patas monkey lying next to the perimeter fence near the primate exhibit where the suspects were last seen. The monkey appeared to have a head injury and died a short time later.
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