No arrests or suspects in mass shooting at toddler’s birthday party in Stockton

California officials predict months-long investigation into 29 November killing of four people, including three children

More than a week after a mass shooting at a toddler's birthday party in Stockton, California, killed four people and injured 17 others, law enforcement has yet to make arrests or name any suspects. It may take investigators months to figure out what led to the tragedy, authorities said.

As investigators parse through the aftermath of the shooting, they have found at least 50 shell casings and believe at least five firearms were used in the attack, San Joaquin sheriff Patrick Withrow told reporters during a press conference on Tuesday.