FORT LAUDERDALE, Fla. (AP) — The former student charged with killing 17 people at a Florida high school last month remained silent in court on Wednesday and had a not guilty plea entered on his behalf as police released more recordings that captured the terror of the Valentine's Day slayings.

Nikolas Cruz, shackled and wearing red jail clothes, sat in the jury box with his head bowed and said nothing during the brief hearing. Because he refused to announce his plea, the judge entered it for him on each of the 34 counts he faces.

His attorney Assistant Public Defender Melisa McNeill reiterated...