Concurrent investigations into the mysterious deaths of millionaire Jonah Shacknai's son and girlfriend are in the process of winding down, but still open.
Shacknai's son, Max, and girlfriend, Rebecca Nalepa (also known as Rebecca Zahau), both died within a matter of days at his mansion in Coronado, Calif.
Jonah's 6-year-old son, Max, was found at the base of the stairs, unconscious. Two days later, Rebecca was found hanging outside the same home, naked.
Law enforcement sources report that despite the fact that Shacknai is not a suspect right now, "It doesn't look like Rebecca's death was by suicide."
The source, who is not named, added, "The evidence we have gathered so far, points us in the direction of this being a very, very suspicious death."
Max died in a San Diego area hospital several days after Rebecca's death. Sources told Radar that Max's death is deemed to be "a tragic accident."