'Family Ties' child star guilt-ridden over impersonator who attacked multiple women

As a former child star, Brian Bonsall knows all too well about the pitfalls of fame. 

In the latest episode of Investigation Discovery’s new series, "Hollywood Demons," the "Family Ties" actor – who famously played Andrew Keaton on the 1980s sitcom – details his early years of stardom, the downfalls that eventually led to decades of substance abuse, and the immense "guilt" he feels after one obsessed man began impersonating him while he embarked on a "random terror against women." 

"[Family...