College coaches absolutely should look into criminal and juvenile records when they are re ruining players for their teams. They should especially do this when there is someone with a criminal record versus another equally talented player who has stayed out of trouble because the latter player is definitely more deserving of the opportunity than the one with the record, especially when there is only one slot.
When colleges recruit athletes they often offer scholarships and other benefits to encourage the athlete to come to their school instead of another. In a sense, they are paying to buy a product and so they should have the right to know what they are getting. An athlete's athletic skills are not the only consideration involved and so the college should do their best to make sure that an athlete's behavior or background will not damage the school's reputation.
Yes, they should look into criminal and juvenile records before they recruit someone. It would certainly save them a great deal of trouble down the line. If they knew that great pitcher was an accused rapist, or that awesome tight end was a thief, it would save the university time, money and lots of PR problems.
College may be the difference between having a good future and having nothing but crime for some kids. If the juveniles have the ability and determination to get into college, I think what they did before should not count against them. However, once they are recruited by the college, they should be held accountable to the same rules and expectations as the rest of the student class if they want to remain at the college.