L.A. Times 
February 13, 2013
Faced with regular barrages of gunfire, officers confronting suspected killer Christopher Dorner lobbed incendiary tear gas into the cabin where Dorner allegedly was holed up, said law enforcement officials with knowledge of the situation.
The cabin caught on fire and authorities believe Dorner was burned inside. A body was discovered but authorities have not confirmed it was Dorner.
Law enforcement sources said the officers got into several gun battles with Dorner during a nearly four-hour siege at the cabin in the Big Bear area. The standoff began when Dorner allegedly fatally shot a San Bernardino County sheriff’s deputy and seriously injured another.
Hoping to end the standoff, law enforcement authorities first lobbed “traditional” tear gas into the cabin. When that did not work, they opted to use CS gas canisters, which are known in law enforcement parlance as incendiary tear gas. These canisters have significantly more chance of starting a fire. This gas can cause humans to have burning eyes and start to feel as if they are being starved for oxygen. It is often used to drive barricaded individuals out.
Full story here.