That's a bit unfair on LIN ground control. The primary cause was the bizjet not following the taxi instructions which had been properly given to it, and not noticing that it was about to cross a runway at an inappropriate point. You can't really blame ground control, as such, for the fact that the surface radar had been taken out of service a long time before.

Ground control's part in the accident itself was really only in failing to notice a subtlety in the terms of a radio transmission from the bizjet which gave a hint that it was in the wrong place, which was a missed opportunity for them to prevent the accident.