Guilty As Sin

Matterazzo said Entwistle told him he had fed Lilly her breakfast and left the house at 9 a.m. to head to Staples and Wal-Mart. When he returned home two hours later, he said he called to Rachel, but got no reply, so he started to clean the downstairs, the stepfather said. Soon, he [Entwhistle] went upstairs and discovered the pair dead, Matterazzo said.

OK, what guy comes home alone and voluntarily "starts to clean the downstairs"? Case closed.