only after the san bernardino athat can the fbi discovered that farook had ties to a radicalized group arrested in 2012 in riverside, california. the group planned to kill members of the u.s. military in afghanistan. farook's friend enrique marquez told investigators the arrest of the group is what caused him and farook to abandon their plans to launch their own attack that same year. >> we don't know if this was completely lost and the fbi never saw it or we don't know if they saw some links but didn't have the resources to look at what farook was doing. >> reporter: tonight, cnn has learned the fbi is moving away from the idea a workplace dispute that day is what caused the couple to target farook's office when they did. >> it certainly is very possible that they had other targets in mind, either that day or in the future so what set them off that particular day i don't think we know. >> and one reason investigators are moving away from the spur of the moment work dispute theory is because on the day of the attack the couple drove an suv