15-year-old boy missing from York found safe and well Can you help trace the witnesses? May 12, 2017 8.18 pm YorkMix News & views Police thanked everyone for sharing their appeal A teenage boy missing from his York home has been found. Alex McKenna, 15, went missing on Thursday afternoon (May 11). North Yorkshire Police said on Saturday that he had been found safe and well. They thanked everyone for sharing their appeal.