Surveillance video of yesterday's deadly confrontation between police, the FBI and knife-wielding suspect Usaamah Rahim in Roslindale will be shown to Islamic and other clergy and civil rights advocates today .The meeting is closed to the public and press, Boston police Officer Stephen McNulty said.The meeting is being hosted by Boston Police Commissioner William Evans and Suffolk District Attorney Daniel Conley, and will also be attended by FBI Boston Special Agent-in-Charge Vincent Lisi.