In most instances, bullet-proof vests save the life of a law enforcement officer who has been shot in the chest. However, armor-piercing ammunition-ammunition which currently exists and is legally sold-can penetrate bullet-proof vests. Law enforcement officers, then, have no protection against criminals using armor piercing bullets. During debate on the gun industry liability bill, Majority Leader Frist (R-TN) proposed an amendment which would require the attorney general to commission a study to determine a uniform standard for assessing whether or not a particular type of ammunition is armor-piercing. Frist's amendment would also increase penalties for criminals who use armor piercing bullets. Progressives viewed Frist's amendment as too weak and they voted against it. In the view of Progressives, armor piercing ammunition serves little purpose other than to kill police officers and its sale should be outlawed. Conservatives supported Frist's amendment. In their view, Congress should not be passing laws governing the sale of armor piercing ammunition until a standard for assessing armor piercing bullets can be determined. Republicans voted unanimously in favor of Frist's proposal and, on a 85-12 vote, the measure was added to the underlying gun industry liability legislation.