About 3 p.m., the caller said his foe had killed his brother and mother, but cops arriving at the Long Beach address found his 17-year-old video game opponent playing "Call of Duty" in his own home, CBS 2 reported.
The perpetrator placed his emergency call using the Internet and could be anywhere across the globe. Investigators are trying to track down the call's origin.
Officials say a 16-year-old boy is lucky to be alive and unharmed after flying from California to Hawaii stowed away in a plane's wheel well, surviving cold temperatures at 38,000 feet and a lack of oxygen.
"Doesn't even remember the flight," FBI spokesman Tom Simon in Honolulu told The Associated Press on Sunday night. "It's amazing he survived that."
Simon said security footage from the San Jose airport verified that the boy from Santa Clara, Calif., hopped a fence to get to Hawaiian Airlines Flight 45 on Sunday morning. San Jose police say they will be reviewing whether charges are warranted against the boy.