You guys really make me feel scared with all the I-might-get-screwed-too thing! And sadly you guys are right! Today I went to see him and he was negotiating that he begged me not to report and that he'd really want to reedit the whole thing. I agreed, maybe he'd learn his lessons after all. Then, when I met another friend, B, I was informed that jackass had a plan to delete what he reproduced of mine and instead of wanting to do the whole thing again, he now planned to plagiarize B. I guess now B and I need to really report him then.
I consulted one of my other friends who had the same situation, and he said that once a thief, always a thief. Once a liar, always a liar. I guess he's right.