Answer:
Sean's violent tendencies
Explanation:
When Judge Johnson is sentencing Sean, he most likely takes a huge variety of factors into account. This will allow him to mandate a punishment that is fair and proportional. One of the factors he most likely considers is the fact that Sean is a danger to other people. This is especially the case due to Sean's violent tendencies. Sentencing to prison will not only reflect the need for Sean to reform, but it will also be a way to protect other people from Sean.