Abortion opponents are turning on a Kansas prosecutor who abandoned a high-profile criminal case against a Planned Parenthood clinic.

Some publicly question explanations Johnson County District Attorney Steve Howe has given for dropping the most serious charges.

Anti-abortion activists had seen Howe as sympathetic and well-intentioned. But the anti-abortion group Operation Rescue has called for Howe to resign in the days since the last charges were dismissed against the clinic in the Kansas City suburb of Overland Park.

The clinic once faced 107 charges, including 23 felonies, accusing it of falsifying documents and performing illegal late-term abortions, allegations it strongly disputed. Advocates on both sides of the abortion debate believed it was the first criminal prosecution of a Planned Parenthood clinic.

Howe said he’s not surprised by the criticism.