Fans of 'How to Get Away with Murder' will be seeing Professor Annalise Keating (Viola Davis) trying to solve another mystery, when the show returns for its second season on ABC on Sept 24. This time she would be investigating the death of her client Rebecca Sutter (Katie Findlay).

According to IB Times, Findlay, a drug dealer, was on house arrest when she died and the only two characters who are know about the incident are Keating and her associate Frank Delfino (Charlie Weber). While both have denied their connection with the crime, Delfino continues to be a suspect primarily because he earlier killed Lila Stangard (Megan West).

Referring to her employees' involvement in the crime, actress Viola Davis, "If you go into any prison today everybody will say, 'I didn't do it' even if you found the DNA there. So as an actor, I made a choice that it was a total surprise to me. At the end of the day, I don't trust Frank. It's a path I created for Annalise because of her past."

The 49-year-old law professor also revealed that Weber's is a baffling character and fans of 'How to Get Away with Murder' will come to know more about him in the upcoming season.

The Hollywood Reporter quoted Keating as saying, "Frank has a lot of mystery about him. The writers are going to explore that much more in the future: how he came to work with Annalise and what his background was. Charlie and I have tried to theorize as much as we could with what Frank and Annalise's past is and what their relationship is. But its network television and just like the season finale, sometimes it's not until you are in the room that you get to fill in the blanks."

'How to Get Away with Murder' Season 2 will premiere at 10:00 p.m. on Thursday, Sept. 24, on ABC.