case analysis

kfld1981

请各位帮忙，怎样做案件分析？？
Betty Boat was the manager of a boat rental business in Portsmouth, NH which was owned by BIG AND BOSSY INC. Betty rarely spoke with anyone form BIG AND BOSSY, but she received her paycheck from them weekly. In addition, at the end of the rental season, Betty received a share of the season’s profits. Betty hired David Donothing to help during the summer and promised that if he did a good job, she would hire him again the following season. In the middle of the summer, Betty received a memo from corporate headquarters that announced that evening rentals would no longer be allowed. Betty needed the extra revenue, so she continued to rent boats at night. One evening, one of the rental boats was reported missing and later the renter was found in the water suffering from injuries sustained when the boat capsized. BIG AND BOSSY refused to defend the lawsuit when the renter sued Betty.Betty was then fired.The next season, David Donothing showed up for work, found the building locked and broke in.When inside, he saw a man and thinking the man was a burglar, grabbed him thereby breaking two of the man's ribs.The man turned out to be the new manager.