Billy Chemirmir

Benjamin Koitaba

  Active for 3 years
(2016-2018) in United States




Jump to:
  1. Summary
  2. Serial Killer Profile
  3. Serial Killer Type
  4. General Information
  5. Characteristics
  6. Childhood
  7. Cognitive Ability
  8. Incarceration
  9. Death
  10. 12 Timeline Events
  11. Serial Killers Active During Spree
  12. Boolean Statistical Questions
  13. 1 Books About Billy Chemirmir
  14. 10 External References
  15. Internal References

Billy Chemirmir (Billy Kipkorir Chemirmir) a suspected Kenyan-American serial killer who was active in the United States of America. Chemirmir, a former healthcare worker, allegedly posed as a maintenance worker or health care provider, to gain entrance into the elderly victim's homes. He allegedly smothered his victims to death with a pillow, stealing jewelry and other valuables. A surviving victim who was smothered with a pillow into unconsciousness, later told investigators that her attacker had stolen a box containing her jewelry. Chemirmir was arrested in 2018 after being identified by his license plate number. As of January 2021, Chemirmir has been indicted on 18 capital murder charges, all of which involved elderly victims and many of whom lived in assisted living facilities.

Billy Chemirmir Serial Killer Profile

Serial Killer Billy Chemirmir (aka) Benjamin Koitaba, was active for 3 years between 2016-2018, known to have ( 18 confirmed / 24 possible ) victims. This Serial Killer was active in the following countries: United States

Billy Chemirmir was born on December 8th 1972 in Kabonyony village, Eldama Ravine, Baringo County, Kenya.

He married in 2004, divorced in 2006.

Prior to his spree he had commited crimes, and served time in jail.

In 2016 (Age 43/44) Billy Chemirmir started his killing spree, during his crimes as a serial killer he was known to rob, murder his victims. He was known to kill at the home of the victim. He would keep personal items from the victim after the crime.

He was arrested on March 20th 2018 (Age 45), sentenced to awaiting trial at the North Tower Detention Facility in Dallas, Texas, US.

Profile Completeness: 61%
serial killers by profile completeness

Billy Chemirmir has been listed on Killer.Cloud since July of 2019 and was last updated 3 years ago.

Billy Chemirmir a known:

Billy Chemirmir
Serial Killer Profile:

Updated: 2021-01-07 Collected by Killer.Cloud
General Information
Name: Billy Chemirmir
Nickname: Benjamin Koitaba
Victims: 18 - 24
Years Active: 2016 - 2018
Ages Active: 43/44 - 45/46
Active Countries: United States
Life Span: 1972 -     
Gender: Male
Sexual Preference: N/A
Astrological Sign: Sagittarius
Nov 22 - Dec 22
Birth Month: December
Marital Status: married in 2004, divorced in 2006
Children: N/A
Living With: N/A
Childhood Information
D.O.B.: Dec 8, 1972
Birth Location: Kabonyony village, Eldama Ravine, Baringo County, Kenya
Birth Order: N/A
Siblings: N/A
Raised By: N/A
Birth Category: N/A
Mother: N/A
Father: N/A

Cognitive Ability
Highest School: N/A
Highest Degree:

Arrested: Mar 20, 2018 (Age 45)
Convicted: N/A
Sentence: awaiting trial
Prison Location: the North Tower Detention Facility in Dallas, Texas, US
Executed: N/A
Previous Crimes: TRUE
Previous Jail: TRUE
Previous Prison: N/A

Death Information
Death Date: N/A
Cause of Death: N/A
Death Location: N/A
Killed In Prison: N/A
Suicide: N/A
12 Timeline Events of Serial Killer
Billy Chemirmir

The 12 dates listed below represent a timeline of the life and crimes of serial killer Billy Chemirmir. A complete collection of serial killer events can be found on our Serial Killer Timeline.

Date Event Description
Dec 08 1972Billy Chemirmir was born in Kabonyony village, Eldama Ravine, Baringo County, Kenya.  #19721208
Dec 08 1992
(Age 20)
20th Birthday
Dec 08 2002
(Age 30)
30th Birthday
Jul 29 2012
(Age 39)
arrest, assault #20120729
Location: Dallas, Dallas County, Texas, US

Billy Chemirmir was arrested for assaulting his girlfriend.

Dec 08 2012
(Age 40)
40th Birthday
(Age 43/44)
Billy Chemirmir started his serial killing spree. #2016
Jun 28 2016
(Age 43)
court appearance #20160628
Location: a court in Dallas, Texas, US

Chemirmir pleaded no contest on his 2012 assault charge, a criminal trespassing and failing to identify himself. Chemirmir was sentenced to 70 days in jail and fined $2,000.

(Age 45/46)
Billy Chemirmir ended his serial killing spree. #2018
Mar 20 2018
(Age 45)
Billy Chemirmir arrested. #20180320
Mar 23 2019
(Age 46)
immigration detainer #20190323
Location: Dallas County Jail, Dallas County, Texas, US

Deportation officers with U.S. Immigration and Customs Enforcement (ICE) filed an immigration detainer with the Dallas County (Texas) Jail on Billy Kipkorir Chemirmir, 45, a citizen of Kenya and a lawful permanent resident of the U.S., after he was charged with capital murder.

Dec 29 2020
(Age 48)
18th capital murder charge #20201229
Location: Dallas County grand jury, Dallas, Texas, US

A Dallas County grand jury indicted Chemirmir on his 18th capital murder charge.

Dec 08 2022
(Age 50)
50th Birthday
Back to top Serial Killers Active During

The following serial killers were active during the same time span as Billy Chemirmir (2016-2018).

Serial Killers By Active Year

18 / 40
Serial Killer
Boolean Questions:
previous crimes TRUE 367
previous jail TRUE 352
kill at victims home TRUE 323
totem personal item TRUE 354
robbed TRUE 418
kill at killers home FALSE 320
used weapon FALSE 453
used gun FALSE 451
rape FALSE 453
torture FALSE 426
blindfold FALSE 363
bound FALSE 406
strangle FALSE 443
sex with body FALSE 430
mutilated FALSE 447
ate part of body FALSE 451
drank blood FALSE 442
totem body part FALSE 365

Books that Mention Billy Chemirmir

Book: The Psychology of Death Investigati... (mentions serial killer Billy Chemirmir)
Katherine Ramsland
The Psychology of Death Investigations

1 Books that mention Serial Killer
Billy Chemirmir

ISBN10 Book Title Killers
1351737562 The Psychology of Death I... 3
External References
  1. Suspect Charged with Attempted Capital Murder on, Retrieved on Jul 12, 2019.
  2. Diana Zoga, Suspected Serial Killer Charged in Additional Deaths of Elderly Women on, Retrieved on Jul 12, 2019.
  3. Antonia Noori Farzan, A jewelry box led police to revisit hundreds of deaths on, Retrieved on Jul 12, 2019.
  4. Charles Scudder, 6 new alleged victims of Dallas serial murder suspect, bringing total to 18 on, Retrieved on Jul 12, 2019.
  5. Bookin Number: 18013860, Dallas County Online Jail Search on, Retrieved on Jul 12, 2019.
  6. Kaley Johnson, Accused DFW serial killer tied to 19th death; family sues assisted living facility on, Retrieved on Jul 24, 2019.
  7. Frances Mulraney, Accused serial killer tied to a THOUSAND unexplained deaths is indicted with more murders on, Retrieved on Feb 29, 2020.
  8. Gina Tron, Billy Chemirmir Indicted On 18th Capital Murder Charge on, Retrieved on Jan 7, 2021.
  9. Charles Scudder, Billy Chemirmir is not an unauthorized immigrant, ICE says on, Retrieved on Jan 7, 2021.
  10. Domingo Ramirez Jr., Nichole Manna, Chemirmir accused of killing elderly women in the Dallas-Fort Worth Metroplex on, Retrieved on Jan 7, 2021.
Internal References

Billy Chemirmir is included in the following pages on Killer.Cloud the Serial Killer Database

  1. #4 of 59[ Page 1 ] of Recent Serial Killers sorted by Most Recent
  2. #5 of 43[ Page 1 ] of Sagittarius Serial Killers sorted by Confirmed Victims
  3. #7 of 45[ Page 1 ] of Serial Killers with birthdays in December
  4. #31 of 327[ Page 3 ] of Serial Killers active in the United States
  5. #82 of 651[ Page 6 ] of the A-Z List of Serial Killers
  6. #101 of 651[ Page 7 ] of serial killers sorted by Confirmed Victims
  7. #340 of 651[ Page 23 ] of serial killers sorted by Years Active
  8. #414 of 651[ Page 28 ] of serial killers sorted by Profile Completeness
Serial Killers Statistics, charts Billy Chemirmir is included in: Active Serial Killers by Country, Serial Killers By Gender, Age of Serial Killer by Date, Killers By Astrological Sign, Killers By Birth Month, Active Serial Killers by Year and Statistical Boolean Questions.
Years Active: