Are you asking whether you should major in Computer Science or are you asking about Criminal Justice ?
Are you just entering college as a freshman ? If so, try to take a course in each major in order to better assess your own interests.
It’s okay to be uncertain during one’s freshman year regarding major & career plans. Freshman year is the time to experiment & explore academic offerings. The reason that you are a bit confused is likely due to the fact that you have not yet taken courses in either CJ or CS.