The shooting happened Wednesday afternoon on the 2300 block of North Mountain View Avenue.
Police said it started with a domestic dispute between an adult brother and sister. Witnesses said the sister's husband arrived, shot the brother and then took off.
According to investigators, officers responded to an apartment complex and found the victim, 26-year-old Adan Ruiz, on his front porch. The suspect, Rafael Flores, fled the scene before authorities arrived.
Flores, 27, was arrested without incident Thursday morning when he returned home. Officials said Flores was in possession of a loaded handgun.
The incident remains under investigation. Anyone with information was asked to call Det. Brian Lewis at (909) 384-5762 or Sgt. Gary Robertson at (909) 841-5361.