The two hours before Monday’s deadly attack at the Islamic Center of San Diego were marked by a series of frantic calls by the mother of one of the attackers as short-staffed police struggled to assess the seriousness of the threat and scramble officers to find the shooters.
The mother of 17-year-old Cain Lee Clark first called police at 9:42 a.m., about two hours before the first reports of an active shooter at the mosque. Police did not arrive at her home to speak to her until 11:10 a.m., according to sources with access to call logs.
During that time, the mother had called at least two more times, with greater levels of concern, the sources said. Those calls were enough for police to elevate the incident, more than an hour after the initial call…