Transcript for Kathy Griffin apologizes for Trump photo

Kathy griffin and that image. President trump's responding right now. There's the photo. We blurred out the bloody replica of president trump's head she was holding and the president did tweet moments ago, Kathy griffin should be ashamed of herself. My children, especially my 11-year-old son, Barron, are having a hard time with this, sick. It drew a response from the secret service and Pierre Thomas has the details. Good morning. Reporter: George, good morning. A secret service official tells ABC news the comedian likely will get a knock on her door from an agent who will not be in a laughing mood. Pictures and video depicting comedian Kathy griffin holding the bloodied decapitated head of president trump are no joking matter for the secret service. The image is shot by photographer Tyler shields creating a backlash on Twitter. The president's son don Jr. Tweeting, disgusting but not surprising. This is the left today. They consider this acceptable. Imagine a conservative did this to Obama as POTUS. Chelsea Clinton weighing in too tweeting, this is vile and wrong. It is never funny to joke about killing a president. The secret service had a strong reaction telling ABC news, we don't have the luxury of knowing a person's intent. Each alleged or perceived threat has to be investigated thoroughly. Griffin seemed to know she was stirring the pot. Here she is after the shoot. We have to move to Mexico today because we're going to go to prison, federal prison. Kathy griffin. Reporter: Thymes have surely changed. Here's griffin and trump embracing during an episode of "The apprentice" in 2014 but recently she has been a vocal opponent. I'm a big resister and I don't believe in compromise with this president. The secret service are going to look at this because it's out there. Now, will they seriously put much energy into it? The answer is, no, did Kathy griffin threaten anybody, no. Reporter: Griffin took to Twitter to explain herself first saying I'm merely mocker the mocker in chief and then realizing she made a mistake releasing this video. I sincerely apologize. I'm a comic. I crossed the line. I moved the line then I cross it. I went way too far. I made a mistake and I was wrong. Reporter: Well, this is art or a bad joke, the secret service says it can't afford to take chances threatening communications increase their workload and always concerned it might encourage copycats or the unstable. Thank you, George. Now to new details about

This transcript has been automatically generated and may not be 100% accurate.