TEXAS, USA — This article was originally published by our content partners at the Texas Tribune. Read the original article here .

Texas death row inmate Robert Roberson will not petition for clemency ahead of his scheduled execution in three weeks and will instead focus on obtaining a new trial in his capital murder conviction, his lawyer said Wednesday.

Roberson was convicted in 2003 for the death of his 2-year-old daughter, Nikki, who was diagnosed with shaken baby syndrome. Roberson has maintained his innocence over the two decades he has spent on death row, arguing that scientific evidence developed since his conviction invalidates Nikki’s diagnosis and shows that she died from chronic illness — not from being shaken so violently that she died, as prosecutors claimed at

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