Mass Killings in the United States, 2013
Four or more dead
By a single killer
By any criminal means
In a single emotional event
Suicides count
1) 19 January 2013, Albuquerque NM, 5 killed (shot) (http://murderpedia.org/male.G/g/griego-nehemiah.htm)
2) 13 March 2013, Herkimer NY, 4 killed (shot)
3) 18 April 2013, Billings MT, 4 killed (arson) (https://billingsgazette.com/news/crime/man-admits-to-role-in-lockwood-trailer-fire-that-killed/article_589fc41a-f223-5570-9e90-e547c2546dba.html)
4) 22 April 2013, Federal Way WA, 4 killed (shot)
5) 24 April 2013, Manchester IL, 5 killed (shot)
6) 28 April 2013, Ottawa KS, 4 killed (shot)
7) 2 May 2013, Schenectady NY, 4 killed (arson)
8) 10 May 2013, Percy IL, 4 killed (arson)
9) 11 May 2013, Waynesville IN, 4 killed (shot)
10) 13 May 2013, Fernley NV, 5 killed (shot)
11) 7 June 2013, Sana Monica CA, 5 killed (shot) (http://murderpedia.org/male.Z/z/zawahri-john.htm)
12) 15 June 2013 Burleson TX, 4 killed (Vehicular Homicide) (https://en.wikipedia.org/wiki/Ethan_Couch) Affluenza Defense
13) 26 June 2013, Clarksburg WV, 4 killed (shot)
14) 16 July 2013, Philadelphia PA 4 killed (vehicular homicide) (http://www.dailymail.co.uk/news/article-2366791/Mother-young-boys-killed-crossing-Philadelphia-road-hit-drag-racers.html)
15) 26 July 2013 Hialeah FL, 6 killed (shot) (http://murderpedia.org/male.V/v/vargas-pedro-alberto.htm)
16) 7 August 2013, Dallas TX, 4 killed (shot) (http://murderpedia.org/male.B/b/bowser-erbie.htm)
17) 14 August 2013, Oklahoma City OK, 4 killed (shot)
18) 17 August 2013 West TX, 15 killed (arson resulting in an industrial explosion) (https://en.wikipedia.org/wiki/West_Fertilizer_Company_explosion) unsolved
19) 16 September 2013, Washington DC, 12 killed (shot)
20) 20 September 2013, Rice TX, 4 killed (shot) (http://murderpedia.org/female.R/r/ronquillo-ovalle.htm)
21) 9 October 2013, Paris TX, 4 killed (shot)
22) 26 October 2013, NYC NY, 5 killed (stabbed) (http://murderpedia.org/male.C/c/chen-mingdong.htm)
23) 26 October 2013, Phoenix AZ, 4 killed (shot)
24) 28 October 2013, Terrell TX, 5 killed (shot)
25) 29 October 2013, Callison SC, 6 killed (shot)
26) 6 November 2003 Chesnee SC 4 killed (shot) (http://www.cbsnews.com/news/todd-kohlhepp-pleads-guilty-in-seven-south-carolina-slayings/)
27) 7 November 2013, Jacksonville FL, 4 killed (shot)
28) 23 November 2013, Tulsa OK, 4 killed (shot)
29) 23 November 2013, Parsons KS, 4 killed (strangled)
30) 1 December 2013, Topeka KS, 4 killed (shot)
Total Incidents 30
Total Killed 149
there doesn't seem to be anything here