(CNN) -- Charges against a police officer jailed in a two-state shooting rampage will be formally dropped Wednesday, a prosecutor said. Brian E. Dorian, 37, was to be released on his own recognizance Tuesday night, Will County State's Attorney James W. Glasgow announced. "I feel horrible that Brian Dorian went through this," said Glasgow, adding that evidence at the time and identification in lineups merited the charges. "At no time did we stop looking for exculpatory evidence." A forensic analysis of Dorian's home computer and its activity put Dorian at home at the time of the shootings and verified his alibi, authorities said. The officer also told them he was watching sports programs and using e-mail.
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Police officer will be freed in Illinois and Indiana shootings
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Analysis of computer shows he was at home at the time of crimes
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One person was killed and three wounded in shootings south of Chicago
Dorian was arrested Friday in the killing of one person and the wounding of three others in the spree, which occurred south of Chicago, @placeholder.