More than 100 officers from various agencies are battling with the snowy conditions as they continue the search for a former Los Angeles police officer accused of killing three people because he felt he was unfairly dismissed from his job.
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Armed police have carried out a raid apparently linked to Wednesday's deadly terror attack in Westminster.
Cheryl Grimmer vanished from inside a beach shower block in Wollongong, Australia, in 1970, when she was just three.
Pc Keith Palmer was on the front line and because of his actions, the Westminster attacker was unable to kill anyone else.