IOWA CITY, Iowa (AP) — The Iowa Supreme Court on Friday overturned the conviction of a lottery employee implicated in a nationwide fixing scandal, saying his trial over a rigged $16.5 million Iowa jackpot was tainted by a dawdling investigation. The ruling is a symbolic victory for former Multi-State Lottery Association security director Eddie Tipton, whose lawyers argued that Iowa's long-running inquiry into the 2010 jackpot let the statute of limitations expire. After the case eventually hit a dead-end, investigators in 2014 released surveillance video of a hooded man purchasing the winning ticket at a Des Moines gas station in 2010. The court said the guilty verdict on the redeeming charge was tainted because the statute of limitations had expired on two of three legal theories that were presented to jurors. Prosecutors theorized at trial that Tipton disabled security cameras in the drawing room and installed a self-deleting root kit that rigged the outcome.