1. Seattle Police Department
  2. Mark Sierra

Officer Detail: Mark Sierra

General Information

Name Mark Sierra
OpenOversight ID 1455
Department Seattle Police Department
Race Hispanic
Gender Male
Birth Year (Age) 1988 (~36 y/o)
First Employment Date 2016-10-20
Number of known incidents 8
Currently on the force Yes

Assignment History

Assignment changes are estimated based on title changes between rosters obtained from the department. As a result, no assignments from before 2011 are available at this time.
Job Title Badge No. Unit Start Date End Date
Police Officer 8455 South Pct 1St W - Robert 2019-10-14
Police Officer Probation 8455 South Pct 1St W - Robert (Ocean) 2017-06-29 2019-10-14
Police Student Officer 8455 Training - Field Training Squad 2017-03-28 2017-06-29
Police Recruit 8455 Hr - Blea - Academy Recruits 2016-08-16 2017-03-28

Salary

Annual Salary Overtime Total Pay Year
$107,000.00 (data incomplete) 2021
$73,199.71 $3,958.63 $77,158.34 2020

Incidents

Incident OPA Case 2019OPA-0047

Date Jan 15, 2019
Report # OPA Case 2019OPA-0047
Department Seattle Police Department
Officers Kyle R. Squires , Andrew Ganem , Joseph Macniak , Matthew Lecompte , Mark Sierra , Kame Spencer , John W. Hahn
Description

Allegation 1 — Performance of Duty

Name: John Hahn
Badge #: 7691
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 2 — Performance of Duty

Name: Joseph Macniak
Badge #: 8366
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 3 — Performance of Duty

Name: Kame Spencer
Badge #: 8572
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 4 — Performance of Duty

Name: Matthew Lecompte
Badge #: 8423
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 5 — Performance of Duty

Name: Mark Sierra
Badge #: 8455
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 6 — Performance of Duty

Name: Kyle Squires
Badge #: 7437
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 7 — Performance of Duty

Name: Andrew Ganem
Badge #: 8583
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Source: Community Member
Case Status: Completed
Legend
Address Seattle, WA
 

Incident OPA Case 2018OPA-1066

Date Nov 08, 2018
Report # OPA Case 2018OPA-1066
Department Seattle Police Department
Officers Mark Sierra
Description

Allegation — Conformance to Law

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Source: Community Member
Case Status: Completed
Legend
Address Seattle, WA
 

Incident OPA Case 2019OPA-0132

Date Oct 31, 2018
Report # OPA Case 2019OPA-0132
Department Seattle Police Department
Officers Sarah Emerson , Mark Sierra , Sean Farrior
Description

Allegation 1 — Stops, Detentions and Arrests

Name: Sean Farrior
Badge #: 7500
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Lawful and Proper

Allegation 2 — Force - Use

Name: Sean Farrior
Badge #: 7500
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Unfounded

Allegation 3 — Stops, Detentions and Arrests

Name: Sarah Emerson
Badge #: 7699
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Lawful and Proper

Allegation 4 — Force - Use

Name: Sarah Emerson
Badge #: 7699
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Unfounded

Allegation 5 — Force - Use

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Training Referral

Allegation 6 — Stops, Detentions and Arrests

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Expedited Investigation
Finding: Not Sustained Lawful and Proper

Source: Community Member
Case Status: Completed
Legend
Address Seattle, WA
 

Incident OPA Case 2018OPA-0346

Date Apr 14, 2018
Report # OPA Case 2018OPA-0346
Department Seattle Police Department
Officers Mark Sierra
Description

Allegation — Bias-free Policing

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Source: SPD - Forwarded
Case Status: Completed
Legend
Address South - SAM - S3
Seattle, WA
 

Incident OPA Case 2018OPA-0135

Date Feb 08, 2018
Report # OPA Case 2018OPA-0135
Department Seattle Police Department
Officers Kyle R. Squires , Mark Sierra
Description

Allegation 1

Name: Mark Sierra
Badge #: 8455
Disposition: OPA Contact Log Closed
Discipline:
Incident Type: Contact Log
Finding:

Allegation 2

Name: Kyle Squires
Badge #: 7437
Disposition: OPA Contact Log Closed
Discipline:
Incident Type: Contact Log
Finding:

Source: Community Member
Case Status: Completed
Legend
Address West - DAVID - D3
Seattle, WA
 

Incident OPA Case 2017OPA-1268

Date Oct 28, 2017
Report # OPA Case 2017OPA-1268
Department Seattle Police Department
Officers Sarah Emerson , Mark Sierra
Description

Allegation 1 — Bias-free Policing

Name: Sarah Emerson
Badge #: 7699
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Allegation 2 — Bias-free Policing

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Source: Community Member
Case Status: Completed
Legend
Address South - ROBERT - R1
Seattle, WA
 

Incident OPA Case 2017OPA-1194

Date Oct 23, 2017
Report # OPA Case 2017OPA-1194
Department Seattle Police Department
Officers Justin Claxton , Mark Sierra
Description

Allegation 1 — Professionalism

Name: Justin Claxton
Badge #: 7592
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Allegation 2 — Professionalism

Name: Mark Sierra
Badge #: 8455
Disposition: OPA Supervisor Action Closed
Discipline:
Incident Type: Supervisor Action
Finding: Process as Supv Action

Source: Community Member
Case Status: Completed
Legend
Address South - SAM - S1
Seattle, WA
 

Incident OPA Case 2017OPA-0361

Date Apr 10, 2017
Report # OPA Case 2017OPA-0361
Department Seattle Police Department
Officers Mark Sierra , Alexander Z. Brewer , Timothy M. Liston
Description

Allegation 1 — Force - Use

Name: Timothy Liston
Badge #: 5192
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Lawful and Proper

Allegation 2 — Bias-free Policing

Name: Timothy Liston
Badge #: 5192
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Allegation 3 — Bias-free Policing

Name: Alexander Brewer
Badge #: 8449
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Allegation 4 — Force - Use

Name: Alexander Brewer
Badge #: 8449
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Lawful and Proper

Allegation 5 — Bias-free Policing

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Unfounded

Allegation 6 — Force - Use

Name: Mark Sierra
Badge #: 8455
Disposition: OPA No Allegations Sustained
Discipline:
Incident Type: OPA Investigation
Finding: Not Sustained Lawful and Proper

Source: SPD - Forwarded
Case Status: Completed
Legend
Address South - SAM - S1
Seattle, WA

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