Seal Beach, CA — The 8-year-old boy whose father is accused of killing his mother and seven other people in a hair salon last year is the subject of a custody battle.  Dominic Dekraai is in the temporary custody of his older sister, Chelsea Huff.  Chelsea is the daughter from Michelle Fournier’s first marriage. Joseph Burke, Fournier’s stepfather wants to share joint custody with Huff, with Burke handling the child’s finances.  His paternal grandmother, Michelle Hinmon, the mother of the man accused of killing his wife, is now fighting for …