(CNN) -- A Michigan man accused of gunning down an unarmed young woman on his front porch in November was convicted Thursday of second-degree murder, manslaughter and possessing a firearm while committing a felony.

Theodore Wafer, 55, faces a possible life prison term when sentenced on August 21. The jury deliberated for a little less than 9 hours. Wafer claimed he feared for his life when loud banging startled him awake in the early morning hours of November 2, 2013. He opened his front door and fired a fatal shotgun blast into the face of Renisha McBride, 19, who prosecutors say was seeking help after a car accident. On Thursday, a judge ordered Wafer remanded to jail though the defense asked for house arrest.