Friday, April 23, 2010
The Ones Left Behind
Tuesday, October 20, 2009
What About the Crime Post-Blast?
I started reading up on what it takes to work a post-blast crime scene, and though I found a lot of good information, I know it didn’t begin to scrape the surface. I guess that’s the wrong metaphor to use, because after a bomb goes off, there isn’t much surface left. Can you imagine going to the scene? There are tons of material called gross physical evidence. Most of the time you don’t know what you’re looking at, even though nearly everything is potential evidence. The debris is shredded, cut, spun, blended, burned, ruffled and any other adjective describing destruction like nothing you’ve ever seen.
Classifying and Typing
A low explosive is typically heat-sensitive material that burns rapidly, about 1,000 feet per second. High explosives, on the other hand, are considered detonations — decomposition of molecules that are forced through a shock wave at about 10,000 feet per second. The difference between the two is significant in helping to understand what has happened; low explosives are more likely to cause a fire than the shorter impulse time associated with high explosives.
Explosives Differ in Other Ways Too
Low explosives need a housing or container, because burning produces the gases needed for expansion. High explosives give off their energy as the result of a detonation or shock wave and can be out in the open.
Bombing Materials

The activator of the fusing system is put into three basic categories: 1.) time-activated, 2.) victim-activated, and 3.) command-activated. The first uses a time delay, the second is similar to a booby trap, and the third is set off manually, often using a remote-control device. According to GlobalSecurity.org, a person-borne suicide bomb usually employs a high-explosive/fragmentary effect and a command-detonation firing system -- a switch or button the suicide-bomber pushes to set off the blast.
Dr. Kirk Yeager, an explosives forensic scientist at the Federal Bureau of Investigation explainsit quite simply: A bomb consists of an oxidizer and a fuel. An explosion requires oxygen, provided by the oxidizer, and a fuel source, which can be as basic as sugar. A common oxidizer is ammonium nitrate, a primary ingredient of fertilizer. While bombs made with sugar and ammonium nitrate may be less potent than more advanced fuel sources, like TNT, the ingredients are easy to buy and legal to own. It’s interesting to note that the rapid oxidation in a bombing changes the colors of materials such as pipe or steel. (The 2004 Madrid train bombing is pictured above left.) Working the Scene
A team will have a leader, a bomb technician, a photographer and sketch artist, and an evidence custodian. Depending on the size of the blast area, the team may be augmented by additional investigators.
The borders of a post-blast scene can be tremendous in size. Paul R. Laska, a retired crime scene investigator, says the lead investigator generally looks for the furthest item that can be identified as having originated at the point of the blast. A radius is established based on the distance of that item plus half again.
Often investigators will suit up in protective gear including shoe covers to avoid blood-borne pathogens. The scene is monitored for hazardous materials as well.
Collecting and Preserving
- The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) has been collecting, storing and analyzing records on explosives and arson incidents since 1976.
- The FBI works on bombings related to terrorism.
- 1997 Omnibus Consolidated Appropriations Act, 18 U.S.C. 846(b), established a national repository for incidents involving arson and the criminal misuse of explosives.
- The U.S. Bomb Data Center (USBDC) is the sole repository and contains information on more than 180,000 arson and explosives incidents investigated by ATF and other federal, state and local law enforcement and fire investigation agencies.
According to the US Bomb Data Fact Sheet, which provides overall statistics and information such as event locations, bomb types used, and regional maps, contains the figures listed below. Explosives Incidents in the United States: In 2007: 2,772 explosives incidents, 60 people injured, 15 killed, and 633 referred for prosecution. In 2006: 3,445 explosives incidents, 135 people injured, 14 killed, and 745 referred for prosecution.
Monday, April 27, 2009
This Month, We Remember . . .
by Donna WeaverThis month, we observe the anniversary of a national tragedy. April 19th marked 14 years since the devastating act of domestic terrorism perpetrated by political extremist Timothy McVeigh and conspirator Terry Nichols that not only destroyed the Alfred P. Murrah Federal Building (pictured left), but ended the lives of 168 innocent men. women, and children, injured over 800 people, and forever ravaged the lives of their countless loved ones . . . those who survived . . . and a nation. Who could forget the photo (below) that captured the heartbreak of senseless, sudden loss that day.
Hundreds gathered last Sunday at the site of the bombing to commemorate the day where 168 empty chairs sat on the grass in place of the building that once stood there. Loved ones of the victims and survivors read the names of each of those killed and the crowd observed 168 seconds of silence for each life lost.
Several pieces of important legislation were enacted by the U. S. government as a result of the bombing of the Murrah building and its aftermath. Among those, The Anti Terrorism and Effective Death Penalty Act of 1996, Pub. L. No. 104-132, 110 Stat. 1214, (AEDPA) was signed by Congress to "deter terrorism, provide justice for victims, provide for an effective death penalty, and for other purposes.
Because the trials of the perpetrators and conspirators were moved out of state (from Oklahoma to Denver, Colorado), President Clinton signed the Victim Allocution Clarification Act of 1997, which allowed victims of the Oklahoma City Bombing, and those of any future acts of violence, to observe and offer victim-impact testimony at trials.
Clinton stated that "when someone is a victim, he or she should be at the center of the criminal justice process, not on the outside looking in."
Timothy McVeigh (pictured left) was arrested hours after the bombing for driving without a license plate and for carrying a concealed weapon. At his trial, the prosecution stated that McVeigh's motivation for the horrific act of domestic terrorism was his hatred of the U. S. government, which grew in part from the incidents at Ruby Ridge, Idaho in 1992, and the Branch Davidian compound in Waco, Texas in 1993. The April 19, 1995 Oklahoma City Bombing occured on the anniversay of the end of the 51-day seige in Waco in which 50 adults and 25 children died after federal law enforcement launched a fiery assault. McVeigh was executed by lethal injection at a U. S. penitentiary in Terre Haute, Indiana, on June 11, 2001. It was the first federal exection in 38 years.
Terry Nichols was tried twice, once by the federal government, and once by the state of Oklahoma. He was found guilty of the federal charges of conspiring to build a weapon of mass destruction and of eight counts of involuntary manslaughter of federal officers. He was sentenced to life without parole. Although the State of Oklahoma sought the death penalty for 161 counts of first-degree murder, the jury became deadlocked on the issue of death and Nichols was instead sentenced to 161 consecutive life terms without the possibility of parole.
This month also marks the tenth anniversary of the
Columbine High School Massacre where teenagers Dylan Klebold and Eric Harris shot and killed 13 others before taking their own lives on April 20, 1999.As the country observes the beginning of National Crime Victims' Rights Week toda
y, I ask you to not only remember the victims of these and other highly publicized tragic crimes, but the hundreds of thousands of others—survivors, homicide victims, missing persons, and their families and loved ones left behind. To commemorate Crime Victims' Rights Week as well as the last week of Sexual Assault Awareness Month and Child Abuse Prevention Month, Women in Crime Ink will feature other observance posts over the next several days from our contributors and from you, our readers.






