Amateur video shows former astronaut Mark Kelly, the husband of Rep. Gabrielle Giffords, yanking away a dog that clamped down on a baby sea lion at a California beach.
Laguna Beach police tell the Los Angeles Times that the attack happened near an exclusive resort Saturday.
In the video, Kelly's screaming daughter tries to pull her dog from the sea lion as two other women help.
Kelly finally steps in and wrestles the animal free, but it later died.
A spokeswoman for Kelly's political committee says the family crated the dog and then talked to officers.
Police say the dog broke from its leash, and no laws were broken.
Kelly and Giffords recently started a gun control advocacy group.
The former Arizona congresswoman was shot in 2011.