Mainly start from the following points: 1. Family situation.
2. Facts of the case: Accessory, first offender, no action.
3. I realize that my legal awareness is weak and I hope to have a chance to change my ways.
In addition, expressing your stance is not in words, but in your performance.
There is really no need to hire a lawyer. The crime your boss finally convicted is not serious, and your crime is even less serious. You may get a suspended sentence or no punishment.