Identify the Type of Fallacy in the Following Passage

Short Answer

Identify the type of fallacy in the following passage.
"Sharon's father thinks the idea of a space-based laser missile defense is entirely feasible, and he should know-he's a physicist who specializes in laser technology, and he has a degree in computer science."
"Yeah, well, he may be right, but he also works for the defense industry. There's a pot of gold in it for him if people believe that. He's probably not the most reliable source."