The 19-year-old homeless man accused of stabbing a Lowell, Mass., shelter worker to death is being held without bail until a March 8 probable cause hearing, the Boston Herald reports.

In a brief bail hearing in Lowell District Court, Middlesex assistant district attorney Thomas O’Reilly said shelter worker Jose Rafael Roldan was trying to calm an agitated Pericles Clergeau on Saturday when “he sticks him once in the neck.”

The prosecutor also said Clergeau was a flight risk because “he has no firm roots.”