Tracy Smith

And when they interviewed the Sills' children, Mary Catherine and Eric, the 12-year-old twins, each told a similar story to their dad, that Suzanne had not been feeling well that night.

And when they interviewed the Sills' children, Mary Catherine and Eric, the 12-year-old twins, each told a similar story to their dad, that Suzanne had not been feeling well that night.

And when they interviewed the Sills' children, Mary Catherine and Eric, the 12-year-old twins, each told a similar story to their dad, that Suzanne had not been feeling well that night.

The migraine seemed to explain that large pot.

The migraine seemed to explain that large pot.

The migraine seemed to explain that large pot.

And the empty pill bottle was for a pain medication Dr. Sills said his wife took to treat her migraines. So did that make it sound more possible that she could have fallen down the stairs because she was suffering from a migraine?

And the empty pill bottle was for a pain medication Dr. Sills said his wife took to treat her migraines. So did that make it sound more possible that she could have fallen down the stairs because she was suffering from a migraine?

And the empty pill bottle was for a pain medication Dr. Sills said his wife took to treat her migraines. So did that make it sound more possible that she could have fallen down the stairs because she was suffering from a migraine?

And there seemed to be nothing in the couple's relationship to suggest another reason. What did you learn about the Sills' marriage?

And there seemed to be nothing in the couple's relationship to suggest another reason. What did you learn about the Sills' marriage?

And there seemed to be nothing in the couple's relationship to suggest another reason. What did you learn about the Sills' marriage?

Both children attested that their parents loved each other and said they rarely argued and were never violent. Detectives started piecing together a timeline of the weekend.

Both children attested that their parents loved each other and said they rarely argued and were never violent. Detectives started piecing together a timeline of the weekend.

Both children attested that their parents loved each other and said they rarely argued and were never violent. Detectives started piecing together a timeline of the weekend.

It was around midnight when Eric said he and his mom went back upstairs after she put the dogs away in their crate. Mary Catherine had gone to bed in her parents' bedroom. Suzanne was going to spend the night in Mary Catherine's room, which was the quietest.

It was around midnight when Eric said he and his mom went back upstairs after she put the dogs away in their crate. Mary Catherine had gone to bed in her parents' bedroom. Suzanne was going to spend the night in Mary Catherine's room, which was the quietest.

It was around midnight when Eric said he and his mom went back upstairs after she put the dogs away in their crate. Mary Catherine had gone to bed in her parents' bedroom. Suzanne was going to spend the night in Mary Catherine's room, which was the quietest.

Mary Catherine had left a note on her door with what would be her last words to her mom. I know you are tired, she said, but you need to know that I love you. Around 4 a.m., Eric said he woke to the sound of his parents arguing in the next room.

Mary Catherine had left a note on her door with what would be her last words to her mom. I know you are tired, she said, but you need to know that I love you. Around 4 a.m., Eric said he woke to the sound of his parents arguing in the next room.