Blood Drops - S1-E7
Continuity mistake: At the end, when Tina is shown the photos of Brenda they are in a pile of three. The camera cuts to a long shot and there are two in a row. Cut back to Tina and they are a pile of three again. This happens on and off throughout the scene.
Blood Drops - S1-E7
Continuity mistake: Sara takes pictures of Brenda with an UV light camera. The camera used to film the episode for broadcast is barely able to show the walls in the background as tiled. When the UV pictures of Brenda are used in the interrogation, the photos show Brenda's back up against the tile wall.
Answer: He doesn't have the authority to arrest him - when anyone is arrested in the show, a police officer does it. Also he tells Ty that he is going to be submitting his case findings to Ty's insurance company, who would no doubt contact the IRS, who then would have him arrested for fraud etc.