(AP) — Playing an attorney on TV has shown Viola Davis there's a slim — and slippery — divide between guilt and innocence. The 49-year-old actress stars as a defense attorney and law professor on the new ABC show "How to Get Away With Murder," which premiered Thursday to an impressive 14 million viewers. Davis said the role taught her "just how fine the line is between guilt and innocence, and a lie and the truth, and good and bad." Davis has had recurring roles on TV series including "Law & Order: SVU" and "United States of Tara," but it's a new experience for the Oscar-nominated and Tony-winning star to work full-time in TV.