( CNN ) -- A man serving 74 life sentences for kidnapping two Missouri boys and holding one of them for more than four years was assaulted by another inmate , officials said Wednesday . Michael Devlin , 45 , received superficial puncture wounds from a homemade weapon , said Chris Cline , spokesman for the Missouri Department of Corrections . Cline said he could not identify the other inmate , a motive or other matters related to an investigation of the April 9 incident . Devlin is being held in `` administrative segregation '' from other inmates at Crossroads Correctional Center in Cameron , Cline told CNN . He was taken to a hospital and was returned to the maximum-security prison , Cline said . The parents of one boy , whom Devlin is accused of abducting in 2002 , told Oprah Winfrey in a show that aired in 2007 that they suspected their son was sexually assaulted by Devlin . Prosecutors alleged that Devlin produced Polaroid photographs and videos of the youth , then 11 , and took him to Illinois and Arizona . The two boys were discovered in January 2007 . The second victim , 13 at the time , was abducted a few days before Devlin 's arrest . Devlin , a former pizzeria manager , has two reported conduct violations since his 2007 incarceration , according to Cline , who would not describe them . The inmate 's 79 convictions include attempted murder , forcible sodomy , attempted forcible sodomy , armed criminal actions and kidnapping . CNN 's Phil Gast contributed to this report .
Officials : Michael Devlin , serving life sentences , attacked with homemade weapon . He was convicted of kidnapping , assaulting two boys , who were discovered in 2007 . Prison officials have n't released name of inmate involved in attack on boy ; he is serving a sentence for attempted murder and other charges.