"Can we get a solid answer on the difference" between the two situations? Richardson tweeted, NPR reports.

Can we get a solid answer on the difference of her situation and mines? My mother died and I can’t run and was also favored to place top 3. The only difference I see is I’m a black young lady. https://t.co/JtUfmp3F8L

— Sha’Carri Richardson (@itskerrii) February 14, 2022

"The only difference I see is I'm a black young lady," Richardson continued on Twitter. "It's all in the skin."

Richardson did not participate in the 2021 Olympic Games in Tokyo after she tested positive for marijuana and received a 30-day ban. She admitted to smoking marijuana after learning about the death of her mother.

Valieva's legal team allegedly tried to convince the Court of Arbitration for Sport (CAS) that the skater mistakenly ingested trimetazidine from a glass of water that her grandfather used to take his heart medication, The Guardian reports.

Richardson pointed out the apparent difference in how the IOC handled the results of the drug tests for both athletes. Valieva failed the doping test in December but did not face suspension. Also, her positive test results did not immediately become public after she led her team to a gold medal in Beijing. However, Richardson's failed drug test results were quickly made public.

The decision to allow Kamila Valieva to continue competing at #Beijing2022 despite a failed drug test "is just a slap in the face to all of those athletes doing it the right way," says @cbrennansports. https://t.co/moDxPjs92g
pic.twitter.com/zzQZEKQP8O

— USA TODAY (@USATODAY) February 14, 2022

Valieva is not the first Russian athlete accused of doping. Russia participated in a state-sponsored doping strategy during the 2014 Sochi Olympics, The New York Times reports.

Kamila Valieva

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