According to the Los Angeles Times, Durst had amassed quite an impressive net worth ahead of the trial for Susan's murder. If we're going by the Los Angeles Police Department’s official arrest warrant when Durst was apprehended, his total valuation was somewhere around $100 million. Granted, it goes without saying that the mogul likely spent quite a bit of money on lawyer bills, legal fees, and other miscellaneous purchases surrounding his defense.

Durst may have done well for himself independently, but it didn't come without a seriously impressive family nest egg. Per Forbes, The Durst Organization, which was founded by the killer's grandfather, Joseph Durst, in 1903, is worth around $8.1 billion all together. The family has "16 million-square-foot of real estate in New York and Philadelphia, including a 10 percent stake in One World Trade Center."

In 2006, as suspicions mounted even higher six years after he killed Susan, the Durst family decided to buy their controversial kin out and effectively sever ties with him entirely in an attempt to distance themselves from his (then-alleged) terrible actions. The family paid Robert $65 million to never interact with their businesses in any way again, and that was how things remained even through his eventual conviction in 2021 and passing in 2022.