Legal Question in Family Law in Illinois

he can seek custody. Whether he will succeed is a different story. If he is a registered sex offender, a judge will look at his request very carefully. But you do not indicate why he is seeking custody. he perceives that there is something in your live which gives him a basis to seek custody.

Since you are the residential parent, and he has a criminal background like that, it is very unlikely a judge will simply change the child's living arrangements. What he is asking for is a big change for the child, and he has a high burden to get what he is asking for. The key for you is to be careful, and if you are served with anything, immediately contact an attorney. If your worried about his trying to sneak around and do something behind your back, contact an attorney and have the custody changed to full custody for yourself.