Serial Shooter Suspect Tells the Judge He's the Wrong Guy

New evidence links a gun to 4 cases of shootings with 7 others being investigated.
1:20 | 09/22/15

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Transcript for Serial Shooter Suspect Tells the Judge He's the Wrong Guy
We head on to Phoenix. A series of shooters along. Tnt, a suspect telling the judge they got the wrong man. And new the evidence, the gun linked to four cases and seven incidents as well. Leaving the community on edge, fearing a shooter may still on the loose. Here is Katia Whitworth. Reporter: Tonight, a suspect behind bars, but the fear far from over. Police say 21-year-old Leslie Merritt Jr. Used a .9 mm handgun in four of those terrifying highway shootings, but say they are still investigating what happened in the seven other incidents, including the possibility of copycats. We're still working on this and I still think there are things to answer. Reporter: Meanwhile Merritt Jr., potentially facing 28 felony charges, defiant at his arraignment. All I have to say is that I'm the wrong guy. I tried telling the detectives that. Reporter: The father of two whose Facebook postings frequently showed guns claiming he pawned his gun before the shootings. My gun's been in pawn shop for the last two months. I haven't even had access to a weapon. Reporter: But authorities tonight disagreeing and saying they know the date that he pawned the gun. We have the probable cause to believe this is the right guy. Reporter: Merritt jr.'s next court appearance is scheduled for Friday, but investigators still not giving the all-clear. In fact, many bus drivers still being ordered to avoid these freeways. David?

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

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