TWO observations here: 1) the attackers were known by the victims and 2) the attackers WERE armed with their FISTS!
oh and uhuuuuuuuuuhhhhhhhhh, the homeowner had a self defense weapon

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(OH) Two brutal thugs killed by homeowner 10-07-03
Date: Oct 8, 2003 2:29 PM
Oct 7, 2003
Charges not expected in fatal shooting
http://www.mansfieldnewsjournal.com/news/stories/20031007/localnews/405367.html

MANSFIELD (OH) — No charges are expected to be filed in the fatal
shooting
of Keith D. Woodhull, 24, of Mansfield. He was shot and killed about 10
p.m.
Sept. 13 in Tucson, Ariz.

He was shot several times after he and an Arizona man severely beat
Wesley
Stevens, 58, inside his house, according to the Tucson Police
Department.

Both men were shot and killed by Stevens, according to police.

One man was found in front of the home and was pronounced dead. The
other
was found in a car two blocks west of the house, police reported. He was
pronounced dead at the hospital.

The preliminary investigation by homicide detectives found that Stevens
was
home with a female acquaintance when two of her friends entered the home
and
assaulted him.

Stevens shot both men during the assault, police reported.