Incident Summary:
4/27/1971: A bomb detonated in a men's restroom at Tamalpais High School in Mill Valley, California, United States. There were no casualties but the restroom was damaged. Two days after the bombing, Bruce Paul Lohmann, a student at the school, was arrested and admitted carrying out this attack as well as two other recent bombings at banks in the area.
Overview
GTD ID:
197104270001
When:
1971-04-27
Country:
United States
Region:
North America
Province/administrative
region/u.s. state:
California
City:
Mill Valley
What
Attack Information
| Type of Attack () |
Bombing/Explosion |
| Successful Attack? () |
Yes |
Target Information ()
| Target Type: Educational Institution |
|---|
| Name of Entity |
Tamalpais High School |
| Specific Description |
Men's Restroom of Tamalpais High School |
| Nationality of Target |
United States |
Additional Information
| Hostages |
No |
| Ransom |
No |
| Property Damage |
Yes |
| Extent of Property Damage |
Minor (likely < $1 million) |
| Value of Property Damage |
Unknown |
How
Weapon Information
| Type |
Sub-type |
| Explosives |
Unknown Explosive Type |
| Weapon Details |
|---|
| Bomb |
Additional Information
| Suicide Attack? | No |
| Part of Multiple Incident? | No |
| Criterion 1 () |
Yes |
| Criterion 2 () |
Yes |
| Criterion 3 () |
Yes |
| Additional Information |
Bruce Paul Lohmann was a student at Tamalpais High School. Lohmann also admitted bombing two Bank of America branches in Mill Valley California (197103230001 and 197104230004). There were two other fires set at the high school during the same week and there was a bomb threat against the school while Lohmann was being questioned. |
Who
Perpetrator Group Information
| Group Name |
Claimed Responsibility |
| Left-wing extremists |
No |
Perpetrator Statistics
| Number of Perpetrators |
1 |
| Number of Captured Perpetrators |
1 |
Casualty Information
| Total Number of Casualties |
0 Fatalities / 0 Injured |
| Total Number of Fatalities |
0 |
| Number of U.S. Fatalities |
0 |
| Number of Perpetrator Fatalities |
0 |
| Total Number of Injured |
0 |
| Number of U.S. Injured |
0 |
| Number of Perpetrators Injured |
0 |
Sources
Sources
| "Ohio Governor Pleads For May Day Restraint," Washington Post, April 30, 1971. |
| "California High School Boy Admits He Set Off Bombs In School, Banks," The Bulletin, April 0, 1971. |
| "7 Guard Vehicles Target of Arsonists," Eugene Register-Guard, April 30, 1971. |
Criteria
Criteria 1
The act must be aimed at attaining a political, economic, religious, or social goal. In terms of economic goals, the exclusive pursuit of profit does not satisfy this criterion. It must involve the pursuit of more profound, systemic economic change.
Criterion 2
There must be evidence of an intention to coerce, intimidate, or convey some other message to a larger audience (or audiences) than the immediate victims. It is the act taken as a totality that is considered, irrespective if every individual involved in carrying out the act was aware of this intention. As long as any of the planners or decision-makers behind the attack intended to coerce, intimidate or publicize, the intentionality criterion is met.
Criterion 3
The action must be outside the context of legitimate warfare activities. That is, the act must be outside the parameters permitted by international humanitarian law (particularly the prohibition against deliberately targeting civilians or non-combatants.
Doubt Terrorism Proper
The existence of a "Yes" for "Doubt Terrorism Proper?" records reservation, in the eyes of GTD analysts, that the incident in question is truly terrorism. Such uncertainty, however, was not deemed to be sufficient to disqualify the incident from inclusion into the GTD. Furthermore, such a determination of doubt is subsequently coded by GTD analysts as conforming to one of four possible alternative designations: 1) Insurgency/Guerilla Action; 2) Internecine Conflict Action; 3) Mass Murder; or 4) Purely Criminal Act.
Alternate Designation
The determination of "yes" for "Doubt Terrorism Proper" by GTD analysts is coded as conforming to one of four possible alternative designations: 1) Insurgency/Guerilla Action; 2) Internecine Conflict Action; 3) Mass Murder; or 4) Purely Criminal Act.
Successful Attack
Success of a terrorist strike is defined according to the tangible effects of the attack. For example, in a typical successful bombing, the bomb detonates and destroys property and/or kills individuals, whereas an unsuccessful bombing is one in which the bomb is discovered and defused or detonates early and kills the perpetrators. Success is not judged in terms of the larger goals of the perpetrators. For example, a bomb that exploded in a building would be counted as a success even if it did not, for example, succeed in bringing the building down or inducing government repression.
Type of Attack
This field captures the general method of attack and often reflects the broad class of tactics used. It consists of the following nine categories:
- Assassination
- Armed Assault
- Unarmed Assault
- Bombing/Explosion
- Hijacking
- Hostage taking (Barricade Incident)
- Hostage taking (Kidnapping)
- Facility / Infrastructure Attack
- Unknown
Target Information
This field captures the general type of target. It consists of the following 22 categories:
- Abortion Related
- Airports & Airlines
- Business
- Government (General)
- Government (Diplomatic)
- Educational Institution
- Food or Water Supply
- Journalists & Media
- Maritime (includes Ports and Maritime facilities)
- Military
- NGO
- Other
- Police
- Private Citizens & Property
- Religious Figures/Institutions
- Telecommunication
- Terrorists
- Tourists
- Transportation (other than aviation)
- Unknown
- Utilities
- Violent Political Parties
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