snip~
Preliminary information suggested that an argument between the suspect and victim had escalated to physical violence, according to police.

"It appears that during a domestic dispute, the suspect chased the victim from their residence and was able to douse the victim with gasoline," the statement said.

more @
http://www.nbcnews.com/news/us-news/pomona-police-clarence-duwell-dear-suspected-setting-woman-ablaze-n486096

He's a real winner!