Redondo Beach police and the FBI held a news conference Thursday morning. Investigators are looking for the suspect behind the attack, which took place near the AMC Theatres at the South Bay Galleria on Dec. 29.
The victims were a 13-year-old boy and girl. Both of them were stabbed several times, and the boy's heart and lungs were punctured.
Police have released a sketch, and they also have surveillance video showing the suspect walking away after the attack.
"That evil monster preys on our most vulnerable, innocent, precious members of society, 13-year-old children," described Richard, the father of the male victim.
Police believe it was apparently an unprovoked attack. The victims have since been released from the hospital and are recovering at their homes.
"We appreciate the public's help, and that's why every time we get a new piece of information, we're trying to get it out there, because it might just jog somebody's memory that didn't contact us before," said Lt. Joe Hoffman with the Redondo Beach Police Department.
Police are hoping that eyewitnesses who see themselves in the surveillance video contact them as soon as possible. You can watch the footage by visiting, www.redondo.org/depts/police.
The suspect is described as a black male in his 40s, possibly bald with a medium build. Police say he had a beard and mustache and wore prescription glasses, a knit beanie hat, a green and brown fatigue-type jacket, blue jeans and black T-shirt.
If you have any information, contact Redondo Beach police at (310) 937-6685.