Singer Usher’s 11-year-old stepson Kyle Glover has been declared brain dead by doctors after he was struck by a jet-ski. According to sources, Glover has not experienced any brain activity since he was admitted in the hospital. However, the decision of taking him off the life support has not been taken as yet, reports tmz.com. Usher’s estranged wife Tameka has not left the hospital since the incident took place. The 33-year-old singer visited the hospital last night. Glover was struck in the head by passing jet ski-while riding on an inner tube on Lake Lanier in Atlanta.