Pit Bulls – they’d be homicidal maniacs if they were human.

“Toddler killed by San Bernardino family’s pit bull”
http://www.pe.com/localnews/sbcounty/stories/PE_News_Local_D_webpit28.10be8184.html

“Hemet woman wants pit bulls banned from city after attack”
http://www.pe.com/localnews/hemet/stories/PE_News_Local_W_epitbull01.427e61e.html

“Dog-as-deadly-weapon charge unusual but not unheard of”
http://www.dogbitelaw.com/dog-as-deadly-weapon.pdf

“SoCal mom may lose custody of baby mauled by dogs”
http://www.mercurynews.com/news/ci_14852689?nclick_check=1

– and that’s just on a local level.