This was quite good. One suggestion - keeping in mind this was a freewrite so it's a post rules edit or whatever - the knife buried in the garden is not a visual reminder experienced by the narrator in that moment. Why not simply have it on the counter, maybe with some blood, and no mention of the fact that she killed her mom?
I know I'm being picky but you did say in your link that you weren't sure about it, and I thought it was a good piece that you could develop further.
Or maybe she only buried the knife but wasn't the killer? Well anyways it got me thinking so that made it an effective piece.
I generally time myself to keep my freewrites under five minutes but I like to go back and edit it just so it reads nicely and people aren't having to read sentences twice over!
It wasn't really supposed to be visual just something that reminds him of what happened and that something will always be close by, reminding him everyday :) I was going to have it in the sink but decided against it!
Of course! All feedback is good feedback, thank you!