A number of people who knew Mr. Dear said he was a staunch abortion opponent, though another ex-wife, Pamela Ross, said that he did not obsess on the subject. After his arrest, Mr. Dear said “no more baby parts” to investigators, a law enforcement official said.

One person who spoke with him extensively about his religious views said Mr. Dear, who is 57, had praised people who attacked abortion providers, saying they were doing “God’s work.” In 2009, said the person, who spoke on the condition of anonymity out of concerns for the privacy of the family, Mr. Dear described as “heroes” members of the Army of God, a loosely organized group of anti-abortion extremists that has claimed responsibility for a number of killings and bombings.