(Cleveland) - The American Civil Liberties Union of Ohio is calling for a full investigation of Ariel Castro's suicide.

Spokesman Nick Worner contends the death of any individual while in state custody must be taken very seriously and fully investigated, and as horrifying as Castro’s crimes may be, the state has a responsibility to ensure his safety from himself and others.

Worner says questions remain whether Castro was properly screened for suicide risk and mental illness. He feels prisons administrators must address these issues, not only to fully account for how Mr. Castro was able to commit suicide, but also to prevent this from occurring again.

Castro’s suicide marks the seventh in Ohio prisons this year. Less than a month ago, death row inmate Billy Slagle was found hanged in his cell days before his scheduled execution.

Worner tells Newsradio WTAM 1100's Ken Robinson that prison leaders should become more aware of inmates with mental illness and provide them with treatment.

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(Copyright © 2013 by Clear Channel, all rights reserved. Photo by WTAM 1100.)