WATCH: Donald Trump Jr attacks law enforcement over Lady Gaga's dogs Koji and Gustav

Lady Gaga's dogs Koji and Gustav were stolen on Wednesday night and dog walker Ryan Fischer was shot in the incident.

On Friday, the Los Angeles Police Department -- which is leading the investigation -- said the two dogs had been recovered, reportedly thanks to a good samaritan who will receive the $500,000 reward money.

Even after the dogs had been recovered, Donald Trump, Jr. went on Fox News to repeatedly complain about the amount of time the Federal Bureau of Investigation was spending on the case.

The attacks on the FBI by Trump, Jr. came one day after FBI Los Angeles field office spokesperson Laura Eimiller said the FBI was not involved in the investigation.

"LAPD is handling the investigation," Eimiller told the New York Post.

Watch dramatic video of the robbery and shooting: