Authorities say they’ve foiled an elderly businessman’s plan to escape a Florida jail and return to France where he had previously fled in an attempt to avoid child pornography charges.

A tip from outside the jail sparked a two-month investigation of John Manchec, 78, and people he had enlisted in his escape plan, Indian River County Sheriff Eric Flowers said Monday during a news conference.

“Essentially, the plan comes down to this,” Sheriff Flowers said. “These folks that are on the outside are going to wait until Manchec has a doctor’s visit, and they are going to take out our corrections staff while he’s out at the medical facility.”