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What we know about the scheduled execution of Robert Roberson in Texas

caption: Casandra Rivera, left, Anna Vasquez, second from left, and Elizabeth Ramirez, center, of the "San Antonio 4" group, hold boxes with petitions being delivered in the Texas State capitol for Texas Gov. Greg Abbott seeking the pardoning of Robert Roberson's execution. (Nadia Lathan/AP)
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Casandra Rivera, left, Anna Vasquez, second from left, and Elizabeth Ramirez, center, of the "San Antonio 4" group, hold boxes with petitions being delivered in the Texas State capitol for Texas Gov. Greg Abbott seeking the pardoning of Robert Roberson's execution. (Nadia Lathan/AP)

A Texas man is scheduled to be executed Thursday night by lethal injection. Advocates for Robert Roberson — including the lead detective who arrested him and a bipartisan group of state lawmakers — say he is innocent.

Robin Maher, executive director of the Death Penalty Information Center, joins Robin Young to discuss the facts of this case, including the science it’s based on, called “shaken baby syndrome.”

This article was originally published on WBUR.org.

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