A man who was convicted of fatally shooting his ex-girlfriend, who was the mother of his child, in Camden in 2020 was sentenced last week to 70 years in state prison, authorities said. Eric Seddens, 41, was found guilty on March 22 of first-degree aggravated manslaughter, according to a statement from the Camden County Prosecutor’s Office. Police were called to the intersection of 8th and Walnut Street in Camden shortly before midnight on Sept. 29, 2020 after they received a report of a woman in the road, the office said. Officers found the lifeless body of 33-year-old Ashley Allen. She was ta…