Uh, no you don't. A lot of cases get plead down and the cops/DAs are lazy and often don't charge people with crimes they're not sure they can successfully prosecute. That's why there's so many "non-violent drug offenders" in prison all over. Yeah, most of those people were up to no good but got taken down for something less serious.
>>justad+(OP)
And a lot of people are forced to a plea after being overcharged and put through a very long crippling (financially and mentally) process while for the DA/cops is just another day to go to work