The Latest: Groups sue over police treatment at protests

Cameron Sterling, center, son of Alton Sterling, who was killed by Baton Rouge police last Tuesday, speaks to the media outside the Triple S Food Mart, where his father was killed, in Baton Rouge, La., Wednesday, July 13, 2016. At left is attorney Justin Bamberg and at right is attorney L. Chris Stewart. Sterling spoke out for the first time Wednesday, calling his father a good man and asking people not to resort to violence after his death. (AP Photo/Gerald Herbert) Cameron Sterling, center, son of Alton Sterling, who was killed by Baton Rouge police last Tuesday, speaks to the media outside the Triple S Food Mart, where his father was killed, in Baton Rouge, La., Wednesday, July 13, 2016. At left is attorney Justin Bamberg and at right is attorney L. Chris Stewart. Sterling spoke out for the first time Wednesday, calling his father a good man and asking people not to resort to violence after his death. (AP Photo/Gerald Herbert)

By Associated Press July 13, 2016 4 min read

BATON ROUGE, La. (AP) – The Latest on the killing of a black man by white Louisiana police officers (all times local):

3:30 p.m.

A group of local organizations are suing the Baton Rouge police over their treatment of demonstrators protesting the shooting death of a 37-year-old black man.

The American Civil Liberties Union of Louisiana announced the lawsuit Wednesday.

The groups allege that authorities used excessive force, carried out mass arrests and verbally and physically abused protesters.