Planned Parenthood told Congress on Thursday that the organization’s physicians on rare occasions make adjustments to an abortion procedure if a patient wants to donate fetal material.

Cecile Richards, president of Planned Parenthood Federation of America, wrote in a letter to congressional leadership that if a woman who has decided to have an abortion wants to donate the fetal tissue or organs, she and her physician choose which method is best suited to her case. With certain methods, a physician can adjust the procedure to better facilitate the requested donation, she said.

Abortion opponents say the statement amounts to a smoking gun that suggests illegal activity. In one of the series of sting videos that has put the women’s health organization on the defensive since mid-July, a Planned Parenthood physician discusses in graphic terms how procedures may be adjusted to better facilitate tissue donation.

David Daleiden of the Center for Medical Progress, the group behind the videos, told POLITICO on Thursday that the point is something “Congress needs to really hammer home in their investigations.”

Read the article “Does Planned Parenthood’s Letter to Congress about Its Fetal Organ Business Contain a Smoking Gun?” on politico.com.