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A Philadelphia abortion provider will spend another weekend in custody after a jury failed to reach a verdict in his murder case.

Dr. Kermit Gosnell is accused of killing four babies born alive. He's also charged in the 2009 overdose of a patient.

Watch Fox News' special 'See No Evil – The Kermit Gosnell Case,' hosted by Bret Baier, Friday May 3, 9 p.m. ET

Jurors deliberated for more than three days before leaving Friday without a verdict. They are to return Monday.

They must weigh hundreds of counts against the 72-year-old Gosnell, many of them allegations he performed illegal, third-trimester abortions.

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    Jurors asked questions Friday about the murder, racketeering and conspiracy charges.

    Gosnell's lawyer insists there were no live births at the clinic.

    His former employee and unlicensed doctor Eileen O'Neill of Phoenixville is also on trial, charged with fraudulently billing as a doctor. Eight other former employees have pleaded guilty.