James Alex Fields Jr. of Ohio was charged with second-degree murder in Charlottesville, Va., on Saturday after the authorities said he drove a car into a crowd, leaving a 32-year-old woman dead and injuring at least 19 other people who were protesting a rally staged by white nationalists.

Background

• Mr. Fields, 20, was born in Kenton, Ky., to Samantha Lea Bloom.

• He was living with his mother until “five or six months ago” when he moved to his own apartment in Maumee, Ohio, according to an interview that Ms. Bloom gave to The Toledo Blade. They moved to Ohio from Kentucky about year ago because of her job, she said.

• Mr. Fields’s father died before he was born, an aunt, Pam Fields, said in an interview on Sunday. Ms. Fields said she had not seen her nephew, whom she remembered as a “very quiet little boy,” more than five times in the past 10 years.

• A friend and former neighbor of Ms. Bloom’s in the condominium complex where she lived until last year remembered her son as a quiet teenager who “kept to himself a lot.”

“He had some trouble in school making friends,” said the friend, who requested anonymity because she said she feared for her safety.