Transcript for Investigators were tracking Michael Cohen's calls

We'll get the latest on president trump and his embattled personal attorney Michael Cohen. This morning we're learning new details about how law enforcement was tracking Cohen's phone calls before the FBI raided his homes and office last month. ABC's Kyra Phillips has the story. Good morning, Kyra. Reporter: Good morning. We have learned now that not only did investigators covertly sift through Michael Cohen's e-mails, seize his cell phones and computers, but they also monitored who he was calling and who was calling him. Overnight sources tell ABC news, federal investigators have been keeping track of president trump's personal attorney, Michael Cohen's phone calls. It's called pen register. Investigators could see who he was calling and who was calling him, all in realtime. But they were not wiretapping and not listening to any conversations. All part of a growing criminal investigation. Looking in part at possible secret deals made during the campaign to protect Donald Trump. FBI agents started to track Cohen's calls in the days leading up to that early morning raid of his home, office and hotel room in New York. Mr. Cohen, why do you think they raided your office and hotel room? Reporter: It's unclear how long before the raids investigators started tracking Cohen's phone calls. But sources tell ABC news, Cohen and the president spoke days after the raids meaning that phone call could be on investigators' radar. Court filings already revealed prosecutors used warrants to search Cohen's mailgs covertly as part of their months' long investigation into possible criminal conduct. The president has railed against those raids. It's a disgraceful situation. It's a total witch-hunt. Reporter: White house spokesperson Sarah Sanders would not say if Cohen is still the president's attorney. I'm not aware of specific places where he's representing the president. Reporter: Clearly there is mounting pressure this morning on Michael Cohen. His personal finances and relationship with the president coming under intense scrutiny as we learn more details about the investigation, George. No question about that. Okay, Kyra, thanks.

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