Complex sentence: Many activists blamed two "co-operating witnesses" for Rodgers' arrest, both of whom are alleged to have been very close friends and members of the same ELF cell as Rodgers and agreed to become informants for the FBI.
Split into simpler sentences: Many activists blamed two "co-operating witnesses" for Rodgers' arrest. Both of whom are alleged to have been very close friends and members of the same ELF cell as Rodgers and agreed to become informants for the FBI.