the local guide John（当地导游约翰）是对的，这里提供几个【英国国家语料库】的例句供你参考：

The guy on the other end was frantic, demanding to get a message to the boss, David Cawthra.

The driver, 47-year-old Jill Gunns, of Blackwater, has been released on police bail.

...say that Saint-Jean does have the only restaurant anywhere in the Pyrenees to which the Guide Michelin invariably gives two rosettes for its food.

The writer Farag Fudah died on June 8 fromgunshot wounds inflicted by two Islamic fundamentalist gunmen who attacked himas he left his office in the Heliopolis, Cairo.

英语答疑网有类似问题，请参见：

那么，带【定冠词 the 的职业名词 + 人名】这种结构除了表上下文【特指】外，一般还表示什么呢？陆谷孙教授在《英汉大辞典》the 词条 p2102 明确指出：用于人的姓或姓名前，表示所指的正是某位众所周知的著名人士。这句话我的理解是：该结构还可指一个说话者认为听者或读者人所所共知的或大名鼎鼎的人物，名人百姓都可以，人所共知，知名度广即可。例：
The Judge Harris 海瑞斯法官
the tailor Simons 裁缝西蒙斯