Police in South Florida issued a search warrant for anything recorded by an Echo and Echo Dot in the apartment where a woman who was arguing with her boyfriend was killed in July. Police have accused Adam Reechard Crespo of murdering his girlfriend, Silvia Galva, who died of a stab wound to the chest. The voice assistant, which runs in Amazons Echo smart speakers, waits for its trigger word the default is Alexa, though owners can change it to Amazon and then start to listen for commands.”]