Convicted killer Charles Lewis Jr. on the loose in Clinton Twp.

A convicted killer is now on the run after walking away from a Macomb County group home.

Charles Lewis Jr. was convicted of murdering a young woman when he was 15 years old.

He was last seen at a McDonald's at 15 Mile and Harper where he showed for his shift on Sunday. He never returned to the Martin Luther King juvenile halfway house in Clinton Township as he was supposed to.

That has the mother of Shayla Johnson, the woman Lewis was convicted of murdering when he was just 13, very concerned.

"It's just a weight and you never know what is going to happen," Lori Black said. "You never know when that phone call is going to come where I'm going to be."

That phone call came Tuesday, two days after Lewis was reported missing from his rehabilitation house. It sent this mother right back to day her 19-year-old daughter was killed in Lansing in December of 2010.

Lewis Jr. was placed in the home by the Department of Health and Human Services in April of this year. According to the communications director at the juvenile rehab home, he was staying there along with 14 other juvenile offenders. 

"My understanding was that he was on a supervised program," Black said. "How was he able to just walk out of a facility and to go to work?"

The communications director for the house in Clinton Township says tenants have gone missing before. In the past, whenever someone staying here wouldn't show up at their scheduled time, the police were called. In this case, that means Clinton Township and Lansing police, where the original crime happened.

As for who is looking for Lewis, FOX 2 spoke with the Macomb County sheriff, who says he had no idea that a convicted murderer was living and working in his county, let alone was missing.

The Department of Health and Human Services says they can't comment on specific cases when it comes to juvenile offenders like Lewis, but say if and when he is caught, he could face additional punishment through the courts.