A Harris County grand jury investigating allegations that a Planned Parenthood clinic in Houston illegally sold the tissue of aborted fetuses has cleared the organization of wrongdoing and instead indicted two anti-abortion activists behind the undercover videos that sparked the probe. Secret videographers David Daleiden and Sandra Merritt were both indicted on charges of tampering with a governmental record, a second-degree felony that carries a punishment of up to 20 years in prison. Daleiden received an additional misdemeanor indictment under the law prohibiting the purchase and sale of human organs. Harris County District Attorney Devon Anderson announced the surprising indictments Monday after a two-month investigation. "We were called upon to investigate allegations of criminal conduct by Planned Parenthood Gulf Coast," said Anderson, a Republican. "As I stated at the outset of this investigation, we must go where the evidence leads us. All the evidence uncovered in the course of this investigation was presented to the grand jury. I respect their decision on this difficult case." The probe began after the Center for Medical Progress, an anti-abortion group run by Daleiden, released footage of the Houston clinic as part of a series of videos showing Planned Parenthood officials casually discussing the methods and costs of preserving fetal tissue for scientific research. That prompted allegations that the organization was profiting off of tissue -- an allegation that was never proven -- and sparked calls for an investigation from Gov. Greg Abbott, Attorney General Ken Paxton and others. The Center for Medical Progress did not immediately return a message seeking comment Monday.