Police on Tuesday are expected to provide an update on the investigation into last month's mass shooting in Stockton.
Four people, including three children, were killed while attending a child's birthday party on November 29. Over 10 others were injured.
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The victims killed were ages 8, 9, 14, and 21.
Police have not said that any suspects have been arrested.
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However, a 22-year-old attendee of the birthday party was arrested last week for a "parole violation related to his presence" at the scene in Stockton, the San Joaquin County District Attorney's office confirmed.
The reward for information is now more than $130,000.