Table 1.

Coded variables, percent completed (information was available from the news reports), percent yes for completed variable, percent yes for all 418 cases

Variable	Completion rate (418 cases) (%)	% Yes in completed cases (%)	% Yes in all 418 cases (%)
US state	100
Month	100
Exact time	79
Did the incident take place inside	88	51	45
Did the incident take place at the victim’s home	94	58	55
Was there a female defender	98	10	10
Was there a female perpetrator	99	9	9
Did the perpetrator have a gun	78	62	48
If the perpetrator had a gun, did they fire it	82	68	56
Did the defender fire any shots	99	90	90
Did the defender fire more than one shot	56	65	36
Did the defender fire any warning shots	54	10	5
Any victim fatalities	100	5	5
Any perpetrator fatalities	100	35	35
Was the defenders gun a handgun	48	91	44
Where was the defender’s gun*	88
In their home		47	41
On their person		36	32
At their workplace		8	7
In their car		5	4
Relationship between perps and victims*	72
Strangers		39	28
Acquaintance		19	14
Romantic		15	11
Family		9	6
The defender, a security guard/off-duty police	72	9	6
Did the incident occur in the daytime	86	31	27
Were illegal drugs involved	64	11	7
Was alcohol involved	54	10	5
Was it difficult to determine criminal vs victim	99	19	19
Any female victims	98	26	26
Was the defender arrested	97	9	9
If arrested, was the defender charged	77	56	43
Was the perpetrator arrested	99	42	42
If arrested, was the perpetrator charged	74	98	73
Did the defenders action (help) lead to the arrest of the perpetrator	99	31	31

*Only the 4 most common places or relationships are listed in descending order