Megan Lacy Wren, actor Tom Sizemore's missing girlfriend, was once engaged to The Doors legend Robby Krieger's son, Waylon.

What's more, a family member said Wren is suffering from a heart ailment and needs treatment.

Cops in Los Angeles last week questioned Sizemore, who has a criminal record that includes domestic violence, about the March 31 disappearance near Sizemore's downtown Los Angeles loft.