A man convicted of beating and suffocating an Arlington pastor in his own church during a robbery was facing execution on Wednesday, the second scheduled execution in the U.S. so far this year.

The pastor's young widow, Laura Dobson, sobbed on the stand during Steven Nelson's murder trial, saying: 'I didn't know this much evil existed in the world.'

A man on death row for killing a North Texas pastor is scheduled to be executed on Wednesday evening in Huntsville.