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Lintel Washington's murder is horrible enough, but according to authorities, there's a second victim.

But police need proof, and their key witness is only three years old.

But police need proof, and their key witness is only three years old.

Authorities suspect that Lintel Washington was shot and killed by Robert Marks, and to help build their case, they turn to the only known eyewitness.

Authorities suspect that Lintel Washington was shot and killed by Robert Marks, and to help build their case, they turn to the only known eyewitness.

But Marks insists that he has no idea what the three-year-old is talking about.

But Marks insists that he has no idea what the three-year-old is talking about.

Investigators are reluctant to build their entire case on statements from a three-year-old. But it turns out there's another witness, a silent witness that was with Lintel and Marks the entire time.

Investigators are reluctant to build their entire case on statements from a three-year-old. But it turns out there's another witness, a silent witness that was with Lintel and Marks the entire time.

Investigators pull those cell phone records for both Marks and Lintel from the hours before and after she went missing.

Investigators pull those cell phone records for both Marks and Lintel from the hours before and after she went missing.

The data confirms at least part of Robert Marks' statement to police. He and Lintel did meet up near the Baker Walmart at a little after 8 o'clock the night Lintel disappeared.

The data confirms at least part of Robert Marks' statement to police. He and Lintel did meet up near the Baker Walmart at a little after 8 o'clock the night Lintel disappeared.

Investigators believe Marks might have chosen a place where nobody would be suspicious of gunshots. And after staying there for about 10 minutes, records show the phones were on the move again.

Investigators believe Marks might have chosen a place where nobody would be suspicious of gunshots. And after staying there for about 10 minutes, records show the phones were on the move again.

The records then show Marks and Lentel's phones traveling east on I-10, right back into Baton Rouge. Then her phone goes offline.

The records then show Marks and Lentel's phones traveling east on I-10, right back into Baton Rouge. Then her phone goes offline.

According to the police's theory, Marks has managed to hide Lentel's body and gotten rid of her phone. Now he's got to deal with her blood-soaked car and her three-year-old daughter. So he heads back towards Lintel's home.

According to the police's theory, Marks has managed to hide Lentel's body and gotten rid of her phone. Now he's got to deal with her blood-soaked car and her three-year-old daughter. So he heads back towards Lintel's home.

Marks isn't contacting Lentell, but it doesn't mean he's finished making calls for the night.