However, the experiment allegedly left 15 out of 23 monkeys dead. In one instance, a monkey was found missing some fingers and toes, possibly caused by self-mutilation, legal papers claim.

The pet monkey of a drug gang member – dressed up in a bulletproof vest and camouflaged jacket – has been killed in a bloody shootout which also left 11 other cartel members dead. Its owner ...

Dozens of howler monkeys were found dead in the Gulf coast state while others were rescued by residents who rushed them to a local veterinarian. (AP Photo/Luis Sanchez)(Luis Sanchez / ASSOCIATED ...