Bismarck police say four high-risk sex offenders have moved into the city.

Charles Franklind Alyea, 19, is now living at 732 S. 16th St. Alyea must register for the remainder of his life because of convictions in Burleigh County juvenile court in 2003 for gross sexual imposition. He was recently released from custody.

Geoffrey Dale Miller, 24, is now living at 223 S. 14th St., which is a house rented by the Department of Corrections and Rehabilitation for the housing of homeless sex offenders. Miller must register his address for the remainder of his life because of three convictions for gross sexual imposition.

Miller was convicted in 1998, when he was a juvenile, of gross sexual imposition, and he has two gross sexual imposition convictions from 2006 involving a juvenile girl in Bismarck and Mandan. He was recently released from prison after serving a sentence for failing to register as a sex offender.

Christopher Lee Voisine, 20, is now living at 209 W. Rosser Ave. #1. Voisine must register for the remainder of his life because of convictions in 2004 for gross sexual imposition, indecent exposure and sexual assault. Voisine was a juvenile at the time of the offenses, which occurred in Burleigh County. He recently moved to Bismarck.

Richard Raymond Vondal, 59, is now living at 1409 E. Rosser Ave. He must register for the remainder of his life because of multiple convictions.

According to a release from the Bismarck Police Department, Vondal was convicted in 1987 in Grand Forks of gross sexual imposition; of attempted gross sexual imposition in Morton County in 1996; and of gross sexual imposition in Morton County in 1999.

The police release says information about offenders is shared with the public for safety reasons.

"This information is not to be used to threaten, harass, assault or intimidate the registered offenders,"it said.

(Reach reporter Jenny Michael at 250-8225 or jenny.michael@bismarcktribune.com.)