Real estate agents said that Las Vegas gunman Stephen Paddock gambled approximately $1 million per year and paid for his home in cash, while neighbors revealed he built a giant privacy screen around his home.

Paddock was drawn to purchasing his home in Mesquite, Nevada in part because it was at the top of a hill, which afforded him privacy, as there were no homes located behind his, CNN reported.

Speaking on the condition of anonymity, a real estate agent told CNN that Paddock said his source of income was from gambling and that he gambled "about $1 million per year." The agent also said that Paddock paid for the 2,000-square-foot home – $369,022 – in cash.

Shortly after purchasing the home, Paddock did the exact opposite of what he wanted to do – he attracted the attention of his neighbors.

"Paddock erected a solid mesh privacy screen that blocked his neighbors' view of his home," CNN added. "About 20 of them signed a petition, and the homeowner's association ordered him to take it down, neighbors said. The HOA refused to comment."

Paddock reportedly told one his neighbors, "I don't want to be looking at people, and I don't want people looking at me."

Neighbors noted that Paddock wouldn’t wave back at them and that he seemed to have "tunnel vision," as if he were oblivious to the outside world.

At the locations of his other homes, neighbors said the same thing; he was rarely there, and when he was, they often didn’t see him.

Investigators are particularly interested in learning why Paddock purchased 33 firearms in the final 12 months of his life and are looking to see if there was an event that could have caused a shift in his life or his outlook on the future.