A father tells his son that his mother died last night of a heroin overdose and filmed his reaction. The video was posted on the Facebook dad, Bickerstaff Brenden Clark accompanied by the message: "Today I had to tell my 8 year old son that his mother had died last night from an overdose. It's the hardest thing I had to do. My son has no mum because of heroin. It is not a staging is very real. I myself am in rehab, I had nothing since 94 days. Share the video to save the life of a parent "