Environmentally friendly (lead-free) bullets were used in the drive by shooting at University of Alabama Huntsville during March for Science weekend. Similar 5.7x28mm bullets were also used by Ft. Hood Islamic mass murderer in Nov. 2009

5.7mm bullets used in April 2017 UAH drive by shooting are seen as environmentally friendly because they're lead-free. Marketed primarily to European military, the 5.7mm is a "28-grain hollow-point, lead free round for use on ranges where lead may be an environmental concern:" 

4/24/17 and 4/26/17 posts by UAH's Dr. Roy Spencer note Belgian or FN 5.7mm bullets were used in the shooting. More on these bullets follows: 

4/24/17, "Shots Fired into the Christy/Spencer Building at UAH," Dr. Roy Spencer
"Seven Belgian 5.7 millimeter bullets...hit windows and bricks around John Christy’s office from 70 yards away."...
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4/26/2017, "Update on Possible Ecoterror Attack at UAH," by Roy W. Spencer, Ph. D.

"The expensive “boutique” FN Five-seven [5.7 mm] gun used has a loud report."...
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U. of Alabama Huntsville Science bldg.

Added: AL.com reports that 5.8x28mm cartridges found at UAH are high-velocity rounds used in military and police weapons around the world: (No explanation for 5.8 reported here vs 5.7 elsewhere)

4/25/17, "Alabama climate change skeptic believes shots 'targeted' his office floor," AL.com, Lee Roop

"Police say they found seven 5.8 x 28 mm cartridge casings beside Sparkman Drive after being called to the scene Monday morning by a colleague with the office next to Christy's. She found a large hole in her double-pane window and broken glass on the floor when she arrived for work. Police recovered bullet fragments inside the office.

The 5.8 x 28 mm cartridge is a small, high-velocity round used in military and police weapons around the world."


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Added: Nov. 2009 Ft. Hood mass murderer used 5.7x28mm pistol:

A Five-seven 5.7x28mm Pistol was allegedly used [in Nov. 2009] by U.S. Army Major Nidal Malik Hasan when he opened fire on personnel at Fort Hood in Texas. Again, the pistol was called a "high-caliber cop-killer.”...

11/9/2009, "Is the FN Herstal Five-seven 5.7x28mm Pistol Suitable for Civilians?" ctd blog 

"The FN Herstal Five-seveN pistol has been in the news quite a bit lately, so we wanted to do a factual—and honest—review of the pistol. When it was released in 1998, the Five-seveN pistol was marketed as a companion firearm for the P90 submachine gun, which fires the same round. Both are designed around the 5.7×28 cartridge, which has a lower weight than standard intermediate rifle cartridges allowing soldiers to carry more ammunition. 

However, the Five-seveN pistol has been controversial since it’s debut: Detractors derided it, calling it high-powered and unsuitable for civilian ownership.

In 2004, the Brady Campaign claimed that commercial ammunition available for the firearm penetrated level IIa Kevlar ballistic vests. In their attacks on the pistol, they called it a “cop-killer.” 

Investigation by the ATF found no commercially available ammunition fired out of the Five-seven pistol was capable of defeating ballistic armor.

Even more recently, the pistol was allegedly used [in Islamic mass murder of unarmed fellow US officers in Nov. 2009] by U.S. Army Major Nidal Malik Hasan when he opened fire on personnel at Fort Hood in Texas. Again, the pistol was called a "high-caliber cop-killer.”...

The actual Five-seven Tactical pistol weighs in at 1 pound 4.5 ounces empty and 1 pound 11.6 ounces fully loaded. Indeed, one of the primary advantages of the Five-seven pistol is it’s light weight. 

This, combined with the low recoil and muzzle rise, makes the pistol very easy to fire and keep on target."...

http://blog.cheaperthandirt.com/fn-herstal-five-seven-5-7x28mm-pistol/

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Added: Environmentally friendly (lead- free) 5.7mm is primarily marketed to European military, "28-grain hollow-point, lead free round for use on ranges where lead may be an environmental concern:" 

5.7mm Belgian Bullets: 5.7x28mm 28-gr Lead Free FN SS195LF ammo (50 rds), The-Armory.com

 

From Fabrique Nationale Herstal (FNH), this ammo is a 28-grain hollow-point, lead free round for use on ranges where lead may be an environmental concern. Boxer primed and reloadable.  "5.7x28mm FN Ammunition" The 5.7 x 28 mm cartridge was designed for pistols, submachine guns, personal defense weapons and carbines.  It was developed by Fabrique Nationale Herstal (FN Herstal), Belgium and primarily marketed to European militaries for use by vehicle crewmen, artillery personnel and combat engineers and as a military and law enforcement round that has more effective performance against modern body armor when compared with traditional pistol caliber ammunition. The ammo for the civilian market WILL NOT penetrate Level IIA and Level IIIA Kevlar, Kevlar 129 or Spectra vests, contrary to popular myth put originated by misguided politicians and gun control advocates trying to advance their agenda.  Ballistically, the 5.7 round is very similar to the .22 WMR (Winchester Magnum Rimfire) round.  The 5.7x28mm rounds are bottle-necked cartridges with .224 inch (5.7 mm) bullets and come in several versions.  5.7 ammunition is characterized by high muzzle velocity and low recoil, and were designed to be more effective against modern body armor when used in pistols, submachine guns, or carbines." .....................  Added: At least 3 commenters at outdoors fan site, 24hourcampfire.com, say FN 5.7mm gun and ammo used at UAH weekend shooting were likely stolen, "odd caliber for drive-by shooting":  "FN 5.7 - An odd caliber for a drive by shooting" "My guess is that the gun (and ammo) are stolen." "Yes, likely stolen - and fired until the magazine in it when taken was emptied, then tossed."  "My guess is straw purchase or stolen."

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