The association foreclosed on the condo last year, followed by a bank foreclosure in December, the newspaper reported.
The deputy, Robert Paris, 53, and locksmith, Glendon David Engert, 35, were gunned down as they arrived at the apartment late Thursday morning to serve an eviction notice.
The shootings set off a daylong standoff that culminated with a fire engulfing the building.
After getting clearance from fire officials, federal firearms and explosives agents spent Friday afternoon searching the rubble for evidence about the blaze and what led to the shooting.
ATF agents were expected to be on the scene through Sunday, police said.
It was not clear how Thursday's fire began, but the Bee reported the sheriff has acknowledged flash-bang devices and tear gas could have been responsible. Four apartments were destroyed by the fire, and 100 units were evacuated after the shooting.
Findlen said the residents were allowed back into their homes Friday night.
Paris, a 16-year veteran of the department, is survived by his parents, a brother and two adult children.
Friends tell the Bee that Engert was married. He had worked as a surveyor at an engineering firm until he was laid off and then learned to be a locksmith.
He had been hired by the landlord to help deputies gain entry to the apartment to serve the eviction notice, police said.