Those who knew the 21-year-old suspect, Robert Crimo III, say he habitually smoked cannabis, a habit he appeared to share with young mass shooters, including at Uvalde, Dayton, Parkland and Aurora...At some point, his father moved out of the family home into a house two miles away in Highwood, while Crimo stayed with his mother and the Highland Park house fell into disrepair...But when Crimo turned 18, his personality changed, Pacileo told NBC News,..."Instead of therapy, he turned to drugs..."...Another former friend, Bennett Brizes, described the Crimo he knew from age 14 to 17 as "an isolated stoner who completely...