The 16 Venezuelan and Colombian migrants had no idea where they were after being dropped off in Sacramento, said a group assisting them.
Police said they thought Clark had a gun when they shot him seven times. He was holding a cellphone.
Stephon Clark was fatally shot by Sacramento police in his own backyard, carrying a cell phone that was mistaken for a gun.
Animal rights activists have long said declawing is inhumane when done solely for the benefit of humans.
Police believe at least five shooters were involved in the mass shooting in downtown Sacramento last weekend and that it was gang-related violence.
Smiley Martin had posted a live Facebook video of himself brandishing a handgun hours before Sunday's attack, a law enforcement official told AP.
The second suspect is the brother of the first suspect, police say.
Sacramento police have arrested Dandre Martin, 26, in connection with the shooting that killed six people and wounded a dozen others in the heart of California’s capital city.
Sacramento Police have identified 26-year-old Dandrae Martin as a suspect.
Video posted on Twitter showed people running through the street as the sound of rapid gunfire could be heard in the background.