With each of these setbacks, Williams found himself using PCP more and more.

For three years, she had been using pot, alcohol, cocaine, mescaline and PCP, or angel dust.

Before people started using PCP as an illegal drug, it was used as an anesthetic.

The United States made it illegal to use PCP for any reason, or to make the drug, because of its serious effects.

People can have many different effects from using PCP.

People who use PCP can get physically or psychologically (mentally) addicted to the drug.

But not all abused drugs produce tolerance or withdrawal in those who use them, notably PCP, solvents, marijuana and hallucinogens.

Among 199 drug users recruited in 1997-1998, 5.8 percent reported using PCP at least once in the past six months.

Among 605 drug users recruited between 2002 and 2003, 15.2 percent reported using PCP in the prior six months.

The victim's boyfriend said she and the aspiring rapper used PCP the day before the alleged murder took place.