Officers tell Big 2 that the shooting happened at a home in the 600 block of North 4th Street early Thursday morning.
Police found Margarita Hernandez dead at the home around 4:30 AM Thursday.
Hernandez, 40, had a single gunshot wound to her chest.
The Carlsbad Current-Argus reports that the street where the shooting took place was blocked off with crime-scene tape for much of Thursday morning.
Carlsbad Police told The Carlsbad Current-Argus on Thursday afternoon that the shooting was ruled as a suicide.
Police continued to investigate the shooting Thursday evening.