For me, the most awkward section is in the first paragraph.
It's not clear what you mean by 'but I didn't look into him in particular.' The phrasal verb 'look into' means to investigate, as in to look into a situation or a problem. You can't really look into a person.
The other problem is that the tense/time sequencing of 'Since then, I had forgotten about him' doesn't work. 'Since' refers to the time period up until the present, so you can't use 'since' for a finished period of time.
You could say, for example, 'After that, I forgot about him (for a few years)' in the past simple. Alternatively, you could relate this period to what happened last year by using the past perfect, and say, for example, 'I had forgotten about him until one day last year when I saw ...'
Note that you should also use the past simple 'could' in the following sentence about Christy Brown.
Otherwise, it's a nicely written piece of text.