Update: LetsRun article out:
The main details:
-Salazar had been under investigation by USADA since the BBC/ProPublica report in 2015
-Salazar and Dr. Jeffrey Brown were charged by USADA in March 2017. They fought the case with Nike-paid lawyers and it went to arbitration.
-Per the BBC's Mark Daly, "the violations relate to banned steroids, prohibited methods and tampering with evidence to thwart investigators."
Here's what Salazar and Brown were banned for, per USADA
The panel determined that Salazar committed the following violations of the Code:
-Administration of a Prohibited Method (with respect to an infusion in excess of the applicable limit),
-Tampering and/or attempted tampering with NOP athletes’ doping control process, and
-Trafficking and/or Attempted Trafficking of testosterone.
The panel determined that Brown violated anti-doping rules by:
-Tampering with L-carnitine records under WADA (World Anti-Doping Agency) Code Art. 2.5 (2009 & 2015), which carries a sanction of 2 years WADA Code Art. 10.3.1 (2009), and 4 years under WADA Code Art. 10.3.1 (2015).
-Administration of an over-limit L-carnitine infusion under WADA Code Art. 2.8 (2009 & 2015), which carries a minimum sanction of 4 years up to a maximum lifetime ban under WADA Code Art. 10.3.2 (2009) and WADA Code Art. 10.3.3 (2015).
-Complicity in Salazar’s trafficking of testosterone under WADA Code Art. 2.8 (2009) and WADA Code Art. 2.9 (2015). Under WADA Code Art. 10.3.2 (2009), a complicity violation carries a minimum sanction of 4 years up to a maximum lifetime ban. Under WADA Code Art. 10.3.4 (2015), a complicity violation carries a sanction of 2 to 4 years.
https://www.bbc.com/sport/athletics/49882757
USADA statement:
https://www.usada.org/sanction/aaa-panel-4-year-sanctions-alberto-salazar-jeffrey-brown/