He may be like me and just never delete old photos. You could go back a year and find all sorts of random pics on my phone: receipts, parking signs, merchandise tags, etc. Basically, anything I need to preserve or to help my memory at that moment.Here. Having thought about it, I realized that it was not taking a photo in a client's house that made me cringe. It was keeping that photo for a year. A year ago, no one could foresee that the owner of the house to be painted and sold would end up in the epicenter of a major murder mystery. EP was just another mom from a small town. So, maybe someone with poor boundaries takes the photo of an odd wall to share with wife and friends. But why keep it for a year and make public after that? Now i want to know more about that person - did he do any painting work in her new house, too? Could he have left the dried poisonous mushrooms? Besides SP and his family, he is the only person I know to have visited EP's house, and his behavior looks strange to me.
And as for why the painter took the photo...I think it's becoming pretty common for tradesmen to take before-and-after pics to document their work. When I got my car repaired, the body shop did that so there wouldn't be a dispute later. Similarly, when I rent a car, I always take photos all over when I pick it up and again when I bring it back. These days, even delivery people will snap a photo to prove that they actually dropped off the item.
None of that however, excuses the painter from selling the pics to the Daily Mail. If you're going to take pics of people's private stuff you need to have integrity (or their needs to be laws in place) to prevent you from sharing it beyond what is required for your job.