Here is the draft final list. The Commissioner is posting it now as he will be in the air for the next few days. He welcomes your comments and any corrections to his math skills. The final list will end up on Reddit r/lists.
Mass killings in the United States.
Four or more dead (including suicides)
By a single killer
By any criminal means
==2018==
1) 5 January 2018, Santa Clarita CA, 4 killed (shot) (
http://www.latimes.com/local/lanow/la-me-ln-santa-clarita-shooting-20180105-story.html)
2) 8 January 2018 Galveston TX, 4* killed (shot) (
http://abc13.com/murder-suicide-at-san-luis-resort-leaves-family-of-4-dead/2912398/)
3) 18 January 2018 Calhoun County AL, 4* killed (shot) (
http://www.wbrc.com/story/37299290/...ldren-daughters-fiance-before-killing-himself)
4) 28 January 2018 Melcroft PA, 5 killed (shot) (
https://www.vosizneias.com/290190/2...-killed-in-shooting-at-pennsylvania-car-wash/)
5) 29 January 2018 Reading PA, 4 killed (shot) (
http://www.mcall.com/news/breaking/mc-pol-four-people-killed-in-reading-shooting-20180129-story.html)
6) 10 February 2018, Johnson County KY, 5 killed (shot) (
https://www.reuters.com/article/us-u...-idUSKBN1FV07J)
7) 14 February 2018 Parkland FL, 17 killed (shot) (
https://www.vosizneias.com/291498/2...-at-least-15-dead-in-florida-school-shooting/)
8) 16 February 2016 Keego Harbor MI, 4* killed (shot) (
https://www.freep.com/story/news/lo...-witness-mom-triple-murder-suicide/351559002/)
9) 26 February 2018 Van Buren TWP MI, 5 killed (shot) (
http://www.fox2detroit.com/news/loc...ect-spotted-in-van-buren-twp-after-carjacking)
10) 9 March 2018 Yountville CA, 4* killed (shot) (
http://abc7news.com/officials-3-hos...r-day-long-standoff-at-veterans-home/3196562/)
11) 11 March 2018 Mount Pleasant NC, (4 killed) (beaten) (
http://counton2.com/2018/03/10/suspect-in-quadruple-homicide-to-have-beaten-family-to-death/)
12) 13 March 2018 Maricopa County AZ, 4 killed (vehicular homicide) (
https://www.whio.com/news/local/dri...arrested-harrison-twp/og6rA6MrFPMR3bGbSbF6vK/)
13) 13 March 2018 Spanaway WA, 4* killed (shot) (
https://www.cbsnews.com/news/offici...toddlers-their-mother-before-killing-himself/)
14) 14 March 2018 Brooklyn NY, 4* killed (shot) (
https://nypost.com/2018/03/14/toddler-among-four-shot-dead-in-brooklyn/)
15) 26 March 2018 near Westport CA, 8* killed (vehicular homicide) (
http://www.sacbee.com/news/state/california/article207648264.html)
16) 5 April 2018 Syracuse NY, 4 killed (arson) (
http://www.syracuse.com/expo/erry-2018/04/3667303a811930/fitch_street_tragedy_fire_clai.html)
17) 8 April 2018 Mascotte FL 4 killed (vehicular homicide) (
https://www.orlandosentinel.com/news/orange/os-ne-vehicular-homicide-four-dead-20180927-story.html)
18) 10 April 2018 Branson MO, 4* killed (shot)(
https://nypost.com/2018/04/10/neighbor-finds-4-people-dead-in-suspected-murder-suicide/)
19) 18 April 2018 Asheville NC, 4* killed (shot) (
http://www.startribune.com/police-4-dead-3-wounded-in-domestic-shooting/480267993/)
20) 22 April 2018 Antioch TN 4 killed (shot) (
http://abcnews.go.com/US/dead-injured-shooting-waffle-house-nashville/story?id=54643375)
21) 28 April 2018 Delray Beach FL 4 killed (Vehicular Homicide) (
http://www.sun-sentinel.com/local/p...crash-kills-family-arrest-20180724-story.html)
22) 3 May 2018 Grand Forks ND 4 killed (shot?) (
http://www.startribune.com/officer-finds-4-people-dead-inside-north-dakota-home/481645691/)
23) 8 May 2018 Brookville MD 4 killed* (shot) (
https://wtop.com/montgomery-county/2018/05/domestic-disturbance-call-heavy-police-presence/slide/1/)
24) 16 May 2018 Tarrant County TX 5 killed* (shot) (
https://www.nbcdfw.com/news/local/Police-Investigate-Incident-at-Denton-County-Home-482804161.html)
25) 18 May 2018 Santa Fe TX 10 killed (shot) (
https://www.ksdk.com/article/news/c...rios-pagourtzis-fbi-source-says/285-553862431)
26) 28 May 2018 Murfreesboro TN 4 killed* (shot) (
http://www.foxnews.com/us/2018/05/29/police-suicidal-man-kills-wife-her-parents-self-at-home.html)
27) 1 June 2018? Kansas City MO, 4 killed (vehicular homicide) (
https://www.seattletimes.com/nation-world/4-killed-4-hurt-1-charged-in-missouri-police-chase-crash/)
28) 10 June 2018 Parkville MO, 4* killed (shot) (
http://www.kansascity.com/news/local/crime/article212936379.html)
29) 11 June 2018 Orlando FL, 5* killed (shot) (
http://www.nydailynews.com/news/cri...children-domestic-dispute-20180611-story.html)
30) 17 June 2018 Big Wells TX, 5 killed (Vehicular Homicide) (
http://www.newswest9.com/story/38443477/5-dead-after-car-flips-in-border-patrol-chase-in-tx)
31) 28 June 2018 Annapolis MD, 5 killed (shot) (
https://www.cbsnews.com/news/annapo...d-suspect-in-custody-2018-06-28-live-updates/)
32) 6 July 2018 New Castle County DE, 5 killed (vehicular homicide) (
https://www.nj.com/bergen/index.ssf/2018/11/driver_in_crash_that_killed_5_nj_family_members_ch.html)
33) 10 July 2018 Prices Corner DE, 5* killed (shot) (
http://6abc.com/5-found-shot-to-death-including-children-inside-delaware-home/3734627/)
34) 19 July 2018 Table Rock Lake MO, 17 killed (negligence or inattention to duty by a ship’s officer resulting in death) (
https://www.usatoday.com/story/news/2018/07/20/branson-duck-boat-accident-what-happened/806195002/)
35) 27 July 2018 Robstown TX 5* killed (shot) (
https://www.usatoday.com/story/news...bstown-texas-shooting-nursing-home/854178002/)
36) 30 July 2018 Queens NY 4* killed (shot) (
http://www.dailymail.co.uk/news/art...s-home-gruesome-suspected-murder-suicide.html)
37) 12 August 2018 Clear Lake CA 4* killed (shot) (
https://www.pressdemocrat.com/news/8628308-181/clearlake-suspected-murder-suicide-leaves-4)
38) 31 August 2018 Miami FL 4 killed (vehicular homicide) (
https://www.local10.com/news/local/...er-4-killed-2-seriously-hurt-in-crash-on-i-95)
39) 1 September 2018 Near Gary Indiana, 4* killed (vehicular homicide) (
https://www.nwitimes.com/news/local...cle_ce4b7aef-dfe5-550d-9a2f-a84b9a6eefa8.html)
40) 12 September 2018 Bakersfield CA, 6* killed (shot) (
https://www.usatoday.com/story/news/nation/2018/09/12/bakersfield-california-shooting/1287400002/)
41) 20 September 2018 Harford County MD, 4* killed (shot) (
https://twitter.com/Harford_Sheriff/status/1042854943475097601)
42) 20 September 2018 Henderson NV, 4* killed (shot) (
https://www.fox5vegas.com/news/hend...deo_3a2bb536-0dc1-5c4b-990d-1cb256a40c10.html)
43) 7 October 2018 King County WA, 4 killed (vehicular homicide) (
https://www.usnews.com/news/best-st...-not-guilty-in-crash-that-killed-4-passengers)
44) 13 October 2018 near Schoharie NY, 20 killed (negligent homicide) (
https://www.nytimes.com/2018/10/10/nyregion/nauman-hussain-arrested-limo-crash.html)
45) 15 October 2018 Maury County TN, 5* killed (shot) (
https://www.wsmv.com/news/five-dead...cle_ef9b8a02-d0e1-11e8-8089-0bf5e5aa1e86.html)
46) 19 October 2018 2018 Wasatch County UT, 6 killed (vehicular homicide) (
https://www.ksl.com/article/4641004...ed-in-horrific-crash-that-killed-6-identified)
47) 19 October 2018 Ashtabula, OH 4 killed (vehicular homicide) (
https://www.10tv.com/article/4-killed-car-struck-pickup-truck-ohio-intersection)
48) 23 October 2018 Jurupa Valley CA, 4 killed (vehicular homicide) (
https://www.pe.com/2018/10/24/four-killed-one-critically-injured-in-jurupa-valley-crash/)
49) 27 October 2018 Pittsburg, PA 10 killed (shot) (
https://pittsburgh.cbslocal.com/2018/10/27/heavy-police-presence-near-synagogue-in-squirrel-hill/)
50) 4 November 2018 Lake Hallie WI, 4 killed (vehicular homicide) (
http://www.startribune.com/3-girl-s...un-crash-near-eau-claire-wisconsin/499507691/)
51) 8 November 2018 Thousand Oaks CA 13 killed* (shot) (
https://edition.cnn.com/us/live-news/california-shooting-intl/index.html)
52) 12 November 2018 near Pell City AL, 4 killed (vehicular homicide) (
https://www.al.com/news/2018/11/man-charged-with-4-counts-of-murder-in-deadly-pell-city-crash.html)
53) 13 November 2018 Gallup NM, 4* killed (shot) (
https://www.gunviolencearchive.org/incident/1254225)
54) 20 November 2018 Chicago IL, 4* killed (shot) (
https://www.reuters.com/video/2018/...Type=VideoRSS&feedName=TopNews&videoChannel=1)
55) 20 November 2018 Colts Neck NJ, 4 killed (arson) (
https://www.vosizneias.com/310462/2...ltiple-fatalities-at-new-jersey-mansion-fire/)
56) 7 December 2018 Taylors SC 4 killed (vehicular homicide) (
https://www.postandcourier.com/news...cle_e56f4762-fc7e-11e8-9dbc-63bec4a48336.html)
57) 18 December 2018 Miami-Dade County FL, 4* killed (shot) (
https://www.miamiherald.com/news/local/community/miami-dade/article223177860.html)
58) 19 December 2018 Plant City FL, 4* killed (shot) (
https://apnews.com/c583d3ddba554c0b...Twitter&utm_medium=AP&utm_campaign=SocialFlow)
Events: 58
Killed: 317