'A mom's desperate fight to save her son from heroin'
She was driving up Interstate 95, headed to a Christmas reunion in New Jersey, when she got the call.
You need to know that your son Brian is doing heroin.
"I had to pull the car over and throw up," Penny Grieb said, recalling that day in 2011. "I got sick because somehow you know that this might be the beginning of the end."