A Vacaville man will be charged with felony arson and two additional murder charges, authorities announced.
Mairead and Mick Philpott started the fire deliberately with the intention of framing a former partner.
US conservatives including Donald Trump Jr and Sean Hannity have shared misleading figures about arsonists igniting bushfires.
Several people are feared dead after a fire broke out at an animation studio in the Japanese city of Kyoto. Police are investigating a possible arson attack, authorities and local media reported. A man burst into the Kyoto Animation building and started the fire, leaving dozens injured, some critically, Japanese authorities confirmed. The suspect was also injured and taken to a hospital.
Local reports said the man had been sleeping rough with another person near the road.
The police say it is not believed Joel was the original target of the attack.
Firefighters have been battling the blaze for days.
Lancashire Fire and Rescue Service described it as 'absolutely heartbreaking and unbelievable'.