TYB
Prominent New York Lawyer Socata TBM-850 Crash on 2 Oct 2020
Wow. Last ADS-B data had a vertical descent rate of -21312 ft/min and a speed of 587 mph!
Performance
Maximum speed: 611 km/h (380 mph, 330 kn) maximum cruise at 8,534 m (28,000 ft)
https://en.wikipedia.org/wiki/SOCATA_TBM#Specifications_(TBM_900)
If PF had to hazard a guess at this point. It looks like the pilot may have had a medical event and stopped controlling the aircraft.