In the days after Jonah Shacknai's son, Max, and girlfriend, Rebecca Zahau died, he hired a private investigations firm, RadarOnline.com is exclusively reporting.

Shacknai hired San Diego based Elite Services to look into the sudden deaths that rocked his world.

Rebecca Zahau had dropped off her dog, Ocean, at Camp Diggity Dogs for boarding after Max's tragic accident that ultimately resulted in his death.