<human>: Can you give me the gist of the text in a nutshell?

I was fitted for shoes and was told that I needed a neutral shoe, so I have been running in Brooks Defyance (they probably have 200 miles on them at this point, though I have stupidly used them on the elliptical). They felt great until a couple of weeks ago, when about halfway through my long run my right knee started to hurt (inner side of the kneecap). The pain was pretty bad after the run and almost felt like it needed to be cracked. I assumed that I just tweaked it, took a couple days off and iced it and felt fine. 

Today the same thing happened, and I am wondering if it is possible that I start to overpronate when my form gets a bit off?  I have noticed that during squats/yoga that my right foot rolls in slightly.

I have been running short distances for 4 years, but have recently upped my mileage to train for my first half marathon. I am using Hal Higdon's Novice 2 plan, which doesn't have any crazy jumps in mileage and I feel good outside of this problem so I don't think I am trying to do too much too soon?
<bot>: is it possible that I need a shoe made for overpronation even though I have a neutral stride, given that I think I begin to pronate when I'm tired?