While following a blood trail, Dano finds a wallet. He places a glove on one hand and holds a second glove. When he picks up the wallet, both his hands have gloves on them.
When the team breaks into the victim's house, her dog greets Danno then waits by the door. Someone says he's waiting for his owner. In reality, dogs sense the death of their owners from miles away. Being that he sniffed and licked Danno, who was in the presence of the slain owner hours prior, the dog would have smelled her death and would have been howling and acting forlorn, not sat up curiously waiting at the door for her.
A main plot point is the recovery of the black box flight data recorder from the crashed Cessna 177. But the Cessna 177 does not come equipped with one, nor is it required by regulation to be equipped with one.