So I couple of weeks ago, I was given the day off of work when fellow photographer asked me to assist him for a wedding shoot. Here is where things start to bug me a little, since this guy is also a co-worker of mine, and you could say somewhat of a friend, I'm not too sure on that yet. Previously, I had let him borrow my 24-70 for a shoot, to which he replies: "Oh, that lens sucks, it's not as good as my 80 mm 1.8"...........I said, "okay, a simple thank you would have done it". The wedding day came up and he, again, approached me about assisting him, only he couldn't pay me anything since he's doing this as a freebie for a really nice couple and I could use any shots I wanted for my book. I finally said, yes, and offered to help for a few hours, I would bring my own gear, I would hand over memory cards to him for back up the end of the night. He would later have to return them to me with all my shots. A week goes by and nothing, he comes up to tell me that a got a few good shots but the rest are ****ty. He then tells me that I he's going to have to use my cake shots since his didn't come out right. I just went along, and said okay, just give me my cards back. I finally get my cards back, and notice that half the shots are missing from each cards, that's somewhere around 300 shots in raw off a 5DMII. I later found out, through him, that in fact, it was a paid wedding, and I was basically conned into helping him for free, and not only that, he took half of my shots, claimed them as his, and pretended like he didn't delete anything off my cards. Somewhat of a long read, and perhaps an isolated incident as I've never experienced such lack of ethics from a fellow photographer. He's my co-worker, so I've basically cut ties with and now keep relationship strictly work related. All I can say is, burning bridges and stepping is not good business.