The Ramseys bought the house in Boulder in 1991 for $500,000, and then spent another $700,000 in renovating it. I haven't been able to find information on when the construction work began or how long it lasted, but my assumption is that it must have lasted a couple of years. Anyone working on the renovation of the home would already know their way around it since they helped to build it. In addition to the construction workers, there would be various contractors to install plumbing and electrical wiring, along with painters and carpet layers. That would be a lot of people. I read somewhere recently that three or four of the people who worked on the home had criminal records, but I haven't been able to relocate that information. It isn't hard to imagine a minimum wage manual laborer building up a great deal of resentment and loathing against the Ramseys, being envious of their wealth and despising them for it. If the renovation lasted a couple of years, that would give anyone plenty of time to get to know various facts about the family, like the fact that Burke liked to whittle, and hear them use unusual words like "hence," and uncommon ones like "victory." This article http://www.wowessays.com/dbase/ad2/arn278.shtml says that "Police acknowledged that at least 15 people (caterers, housekeepers, and contractors) had keys to the house." Does anyone know when the renovation started and how long it lasted? Or have any information on some of them having criminal records?