The widow of Barker's assistant, Chris Baker, is suing pilot James Bland's estate. Bland's sister tells People, "We know the investigation will eventually show they weren't negligent. James took piloting very seriously. If he felt the plane wasn't maintained properly, he would've refused to fly that day."
Travis Barker and the mother of his bodyguard also filed a lawsuit in November that features similar wording, but they're not going after Bland's estate.
The NTSB investigation is still ongoing.