(CNN)A Georgia police chief who said he accidentally shot and seriously injured his wife while the couple were sleeping in bed has resigned, the Peachtree City Police Department said Wednesday. 

William McCollom stepped down as chief of police in Peachtree City nearly a week after a prosecutor announced that although the New Year's Day shooting appeared accidental, McCollom could eventually face a misdemeanor charge accusing him of recklessly taking a gun to bed after drinking alcohol and taking sleeping medication. 

The shooting in Peachtree City, an upscale community of 35,000 people south of Atlanta, left Margaret McCollom paralyzed below the waist. 

"I have had had two families in Peachtree City -- my police family and my personal family. In light of the recent tragedy in my personal family, I need to continue to focus my time and efforts there," William McCollom said in a message posted Wednesday on the police department's Facebook page. 

Medics and police rushed to the McColloms' home early on January 1 after the chief called 911 to say he accidentally shot his wife as both were sleeping -- by inadvertently moving a gun that he had taken to bed with him. 

"The gun was in the bed, I went to move it, put it to the side, and it went off," McCollom says in a recording of the 911 call. 

Later in the call, the operator asked McCollom, "Were you asleep also when this happened?" 

"Yes," the chief, 57 at the time, replied. 

Last week, Scott Ballard, district attorney for a several-county area that includes Peachtree City, said a Georgia Bureau of Investigation probe found the following:  QUESTIONS:

Q1:
1. When did William McCollom shoot his wife?
2. What holiday was the shooting on?
3. On what holiday did the shooting occur?
Q2:
1. Where did the gun turn up?
2. What was the location of the gun?
3. Where did the gun get discovered?
Q3:
1. How is William McCollom employed?
2. What is William McCollom's occupation?
3. What does William McCollom do for a living?
Q4:
1. What was done to William McCollom's wife?
2. What happened to William McCollom's wife?
3. What did William McCollom's suffer from?
Q5:
1. Did William McCollom's wife die?
2. Did the shooting lead to the death of William McCollom's wife?
3. Was William McCollom's wife killed in the shooting?
Q6:
1. Was William McCollom's wife wounded?
2. Did William McCollom's wife sustain any injuries?
3. Did William McCollom's wife get hurt in the shooting?
Q7:
1. Who shot William McCollom's wife?
2. Who was William McCollom's wife shot by?
3. What was the identity of William McCollom's wife's shooter?
Q8:
1. What could William McCollom be charged with?
2. What charges might William McCollom face?
3. What charges was William McCollom going to potentially receive?
