According to the San Francisco Chronicle, police found a shoe and blood in an area between the gate and the edge of the animal’s 25- to 30-foot-wide moat, prompting the possibility that one of the victims dangled a leg or other body part over the edge of the moat
http://ap.google.com/article/ALeqM5gEclFYG2_eqGTpkeD4OknwUlgqEgD8TPQJKO1