Teen suspect in Canada shooting had turbulent life marred by ‘nomadic’ early years

Wall Street Journal: During her teen years, Van Rootselaar became well-known to the local police. They interacted with her through numerous visits to handle mental-health concerns at the residence where she lived with her mother and younger siblings. More than once, police said, Van Rootselaar was apprehended for assessment under the province’s mental-health law. But she always returned home. At one point, guns being kept in the residence were taken by police and later given back when someone living there petitioned for them…