Police spokesman Justin Mulcahy said officers found Wagner dead with multiple gunshot wounds and that Manning surrendered to officers at the home. Manning has been charged with first-degree murder and first-degree assault.
Police said a motive is still under investigation.
Wagner's death is the county's first homicide this year.
Published at 8:14 PM EST on Jan 4, 2011 | Updated at 8:30 PM EST on Jan 4, 2011