Brian Laundrie's sister speaks out, says she knows nothing about Gabby Petito's death

Brian Laundrie’s sister speaks out, says she knows nothing about Gabby Petito’s death

Brian Laundrie case: Wanted fugitive’s sister told protesters that her family has been ignoring her following the disappearance of her brother and the death of Gabby Petito. Subscribe to Fox News! https://bit.ly/2vaBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox…