A life lesson in this book is don't kill innocent people. one example is when atticus comes home and tells the girls, "...17 bullet holes in him." (235) Everyone know that Tom was innocent, but because he's black it was okay to to murder him.  I tom would have been white they just would have shot to injure, but because tom is black they shot to stone cold murder. 

one time my sister got blamed for something she didn't do, we were fighting and i wanted her to get in trouble so i bit my self really really hard and i yelled my moms name so she would come and i was like "MOM!! emma just bit me." and my mom completely believed me. she as going to grounds mom sister for 2 weeks but i felt really bad so i told my mom the truth. but my sister was innocent and she almost got blamed just like Tom Robinson was innocent and he go blamed.