Complex sentence: At Wilson and Rawls'suggestion, Carcetti decides to defer to Daniels, Herc's former commanding officer, who decides that a reprimand for excessive force is sufficient punishment.
Split into simpler sentences: At Wilson and Rawls'suggestion, Carcetti decides to let Daniels, as Herc's former commanding officer, decide the punishment. Daniels decides that a reprimand for excessive force is sufficient punishment.