SANFORD, Fla. -

The attorney for George Zimmerman, Mark O'Mara, said this case is one of the most "difficult cases" he's ever tried in an exclusive interview with Local 6 after Day 7 of Zimmerman's second-degree murder trial.

[WATCH: Full interview]

O'Mara, former Local 6 legal analyst, talked with Local 6 anchor Lauren Rowe and Investigative Reporter Tony Pipitone about how he thinks the case is going.

"I like where the case is going," O'Mara said, adding he doesn't think Zimmerman saying "f******* punks" and "these a******* always get away" will demonstrate ill will.

"I think that he knows he did nothing wrong," O'Mara said of Zimmerman.

Local 6 asked if O'Mara will have Zimmerman take the stand, but O'Mara said no decision has been made yet.

"We have a lot of witnesses we're going to put on," O'Mara said.

When asked how he felt about Judge Debra S. Nelson's rulings in the case so far, O'Mara said she was being fair.

"Judge Nelson is running the courtroom very well ... she's keeping me and other attorneys in line ... " O'Mara said.

O'Mara said he hasn't had time to watch the public's response to the trial, but is "definitely aware of the impact this case has."

"This is one of the most difficult cases I have ever tried," O'Mara said.