The estranged son of a respected Boston police captain was arrested July 4 by FBI agents as part of a counter-terrorism operation against alleged ISIS-inspired domestic terrorists, federal officials told ABC News today. Alexander Ciccolo, 23, of Adams, Mass., was taken into custody on gun charges after buying two pistols and two rifles from an undercover FBI confidential informant, federal officials said. In a search of his apartment, officials reported they found it loaded with possible bomb-making equipment including a pressure cooker, a variety of chemicals, an alarm clock, along with “attack planning papers” and “jihad” paperwork. FBI agents said he used the name Abu Ali al-Amriki and neighbors said he was a recent convert to Islam. “This is a very bad person arrested before he could do very bad things,” one senior federal official briefed on the arrest told ABC News. PHOTO: A photo of weapons allegedly purchased by Alexander Ciccolo was entered into ...