DALLAS-- The Minnesota woman who shot video of her dying boyfriend after a police officer shot him last week says she realized the traffic stop was different when she heard fear in the officer's voice.

Lavish "Diamond" Reynolds called into a Sunday morning service at The Potter's House, a Dallas megachurch, to talk about the death of her boyfriend, Philando Castile.

Reynolds says that when she heard the officer, "it instantly clicked to me that this was something bigger than myself and Phil."

Reynolds cried as she recounted the shooting and said her daughter, who was shown on camera comforting her, is still telling her "it's gonna be OK."

The killing of Castile outside St. Paul and another black man in Baton Rouge, Louisiana, touched off protests. On Thursday, a gunman opened fire on police at one such protest in Dallas, killing five officers.