Mitchell Lowell is a con artist, kidnapper, and bank robbery mastermind. Mitchell enlisted his son Cyrus Lowell to deliver a gym bag to bank teller Howard Grant and have him fill it with money from his bank's vault, while Mitchell kidnapped Howard's daughter Julie and threatened to kill her to ensure Grant's compliance.
When Cyrus was fatally shot by a bank security guard, Mitchell was identified as the leader of the operation. Detective Fontana tortured him by non-fatally drowning him in a toilet and holding him at gunpoint until he gave up Julie's location, resulting in her rescue. Mitchell's representation, Randy Dworkin, repeatedly tried to have the evidence tossed on the grounds that Fontana's actions were illegal, but this ultimately failed.
Mitchell was found guilty of first-degree robbery and kidnapping and was imprisoned on the maximum penalties. (L&O: "Thinking Makes It So")