Jennifer Lopez — Casper Smart’s Dog Escapes … Attacks Neighbor

EXCLUSIVE

Casper Smart‘s dog escaped from Jennifer Lopez‘s household and bit one of her neighbors … leaving the woman with a broken hand.

Law enforcement sources tell TMZ … Smart’s fighter, named Bear was at JLo’s home further than Los Angeles back in December … when he got loose and clamped down on the neighbor’s hand and arm. 

Since the attack, Bear has…