I'm doing a research paper on pit bulls

Hi I'm Karen, This is my first semester in collegefor an associates degree in environmental science.  I am an animal lover and chose to write my main paper for english on pit bulls.  This is a researched argument paper, the argument is are they dangerous, should they be banned etc.  I have been researching this for about a week, but if anyone can point me in a direction to key information I would greatly appreciate it.