Police were seen removing one one box after another from Dawe's Conception Bay South home on Wednesday, not long after his body was found at a cemetery in nearby Mount Pearl.
On Tuesday night, he killed Julianne Hibbs inside a medical clinic inside Villa Nova Plaza, and then killed her boyfriend, Vince Dillon, who had been waiting in the parking lot.
The RNC, though, will not say how many guns were found in Dawe's home, nor what kind.
Hibbs, 35, had ended her relationship with Dawe, 43, several years ago.
People who knew her said the two had had a troubled relationship, which started when Hibbs was still a teenager, and that Hibbs's family was worried about her safety even after they had broken up.
However, Apryl Stead, one of her friends, said Hibbs had moved on, and that any strains were not obvious to her.
"She was excited for life, and I know that she wanted a baby and I know that she was trying for that," Stead said.
"All I could think was she was such a wonderful person. Why would anyone do this to her?"
Marilyn Crotty, who lived near Dawe's home in Conception Bay South, told CBC News that he was not a model neighbour.
"We were really concerned because we were thinking for a long time, 'There's a lot of suspicious activity down there,'" she said.
Meanwhile, a source close to Dillon, 45, described him as an easygoing man who loved those near him, and that he loved his pet dog, Hayley. The dog escaped from Dillon's car on Tuesday night during the shooting, and friends are now looking for him.