A defense witness in the Martin Heidgen murder trial may have unwittingly shot some holes in the defense's case Friday. Heidgen stands accused of killing limo driver Stanley Rabinowitz, 62, and 7-year-old passenger Katie Flynn after allegedly driving his truck the wrong way on the Meadowbrook Parkway in 2005. A civil engineer, hired by the defense, told the court that it is possible to accidentally drive the wrong way on the Meadowbrook Parkway. The engineer also blamed the state for not having proper signs, including turnaround signs, along the parkway.From day one, the defense has said that Heidgen got on the parkway at Merrick Road. They say he was on the road for less than one mile and didn?t have time to realize he was driving the wrong way. The civil engineer?s testimony about the turnaround, however, places Heidgen on the parkway for more than one mile. If prosecutors can prove Heidgen was intentionally driving the wrong way, they can charge him with murder. Heidgen?s attorney would not comment on the contradiction.

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