Answer:By this movie Laurie has been dealing with Michael for over 20 years. Michael had been institutionalized for a long time and Dr. Loomis had lots of files on Michael. There is no reason to believe Laurie hadn't read those files which would've included photos that would show what he looked like growing from a child to a young adult. Those pics would her a good idea of what he should look like as an older man.
Answer: By this movie Laurie has been dealing with Michael for over 20 years. Michael had been institutionalized for a long time and Dr. Loomis had lots of files on Michael. There is no reason to believe Laurie hadn't read those files which would've included photos that would show what he looked like growing from a child to a young adult. Those pics would her a good idea of what he should look like as an older man.
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