Continued from Page A-1he owned so he could collect the insurance money.He also pleaded guilty to threatening to kill a potential witness against him, a woman who is his ex-lover and former daughter-in-law.As part of a plea agreement, the government dismissed charges that Tezak conspired in 1987 to torch a downtown Joliet building he owned, but he acknowledged his guilt in the incident. The blaze destroyed a building housing the federally funded Will County Private Industry Council and destroyed records stored there that were wanted in a federal investigation.Tezak’s lawyers could not be reached for comment.