Many members of the ERP including Villalobos became fearful of Dalton's true intentions while members of the ERP in 1975 fought amongst one another for power. This fight for power led members of the ERP to betray their own in fear of being spied on by members such as Dalton. Dalton was a main target from beginning interrogated by the CIA while held in prison in Cuba before joining the ERP. The murder of Dalton caused a rift in ERP as members began to leave to join either the National Resistance(RN) or the Armed Forces of National Resistance (FARN). Later in 1982, the ERP joined as one of the four parties that comprised the FMLN. The four groups within the FMLN consisted of the Popular Liberation Forces (FPL), the National Resistance (RN), the Revolutionary Party of Central America Workers (PRTC) and the ERP. The importance of joining the FMLN was to be united with other groups that shared similar ideas of overthrowing the local government. Joaquin Villalobos. ERP's main leader and founder was Joaquin Villalobos who came originally from the ACUS. Villalobos's role in the ERP mainly being a military strategists and by playing a crucial role in negotiations during the end the civil war. Rafael Arce Zablah (Alvarez). Zablah. Zablah was another leader and key activist of ERP that gathered support from local Catholic priests . These communities became an important part of the war by serving as a base for the ERP. Sebastian Urquilla. Urquilla was founder and leader of the ERP who founded the group named "El Grupo". This is significant because as El grupo was disbanded in 1970, members helped form. Edgar Alejandro Rivas Mira. Mira was involved in the murder of Roque Dalton and Roberto Poma. According to the Global Terrorism Database, there have been 65 claimed attacks by the ERP. One of these attacks was a kidnapping in 1977 that included ERP member "Edgar Alejandro Rivas Mira," who kidnapped Roberto Poma and killed his body guards. Poma was a wealthy businessman and President of the Salvadoran Institute of Tourism. The ERP kidnapped him for political and economic reasons as well as to trade him for captured members of the ERP, including commander Ana Guadalupe Martinez. Poma later died from wounds inflicted by the ERP after his release. (IACHR). Another attack by the ERP was the killing of Herbert Ernesto Anaya Sanabria, a leader of the Salvadoran Human Rights Commission.