A 77-year-old Maine man deemed by a judge to be too old to be a threat has been convicted of stabbing a mother to death in front of her twin sons. Forty years earlier, Albert Flick murdered his wife in much the same way. Flick was found guilty of murder Wednesday, after jurors deliberated for less than an hour. He attacked Kimberly Dobbie in broad daylight last year as she talked on her cellphone outside a laundromat. Her 11-year-old boys were nearby, witnesses said.