One of These Things is Not Like the Other

Well, maybe two of these things!

O.J. Simpson, black on white violence. Acquitted of a double homicide.
No riots. No retrial by federal court for civil rights violations.

Rodney King, white on black violence. Four LAPD officers acquitted in state court.
Riots. Retried by federal court for civil rights violations, two officers found guilty and sent to prison.

New Black Panthers, threat of black on white violence. Voter intimidation.
No riots. Trial by federal court for civil rights violations. Case dismissed before sentencing.

BART shooting, white on black violence. Johannes Mehserle, convicted of involuntary manslaughter.
Riots. Investigation started by feds for civil rights violations.

Which of these things is not like the other?

H/T Sesame Street

Cross posted at Left Coast Rebel