Conversion to Islam in U.S. prisons

High rate of conversions to Islam
In addition to immigration, the state, federal and local prisons of the United States may be a contributor to the growth of Islam in the United States. J. Michael Waller claims that Muslim inmates comprise 17-20% of the prison population in New York, or roughly 350,000 inmates in 2003. He also claims that 80% of the prisoners who "find faith" while in prison convert to Islam. These converted inmates are mostly African American, with a small but growing Hispanic minority. Waller also asserts that many converts are radicalized by outside Islamist groups linked to terrorism, but other experts suggest that when radicalization does occur it has little to no connection with these outside interests.
Concern in United States
Concern over jailhouse conversions to Islam first rose in 2001 when Imam Warith Deen Umara, Islamic chaplain for the New York State prison system, was reported to have praised the September 11 attacks...