After more than a week of testimony, and with the judge about to sum up the case, Kadeem Onan Vaughan threw in the towel and pleaded guilty yesterday. Vaughan, 28, of Literary Row, Cheapside, The City, and formerly of Belleplaine, St Andrew, told Justice Wanda Blair in the Supreme Court No. 4A that he wanted to change his plea. He admitted committing aggravated burglary at Savings Plus Supermarket in Rock …