Mother shares video of armed police surrounding black son after they assumed he was attacker when teen called 911

Multiple California police officers were filmed pointing guns at three African American teenagers who were were allegedly being threatened by a homeless man.The mother of one of the teenagers in the video, Tammi Collins, shared an 11-minute clip to her Instagram page, showing officers from the Los Angeles County Sheriff’s Department aiming guns at them in Santa Clarita, California, on 7 August.