BOSTON (AP) — Jurors will begin deliberating Monday in the case of a Massachusetts pharmacist charged with murder in a meningitis outbreak that killed 76 people.

Jurors went home Friday after attorneys gave closing arguments. They are expected to return to Boston’s federal courthouse Monday morning.

Pharmacist Glenn Chin is charged with second-degree murder under federal racketeering law and other crimes. He ran the clean rooms where the drugs that caused the 2012 outbreak were made.

Prosecutors say Chin failed to properly sterilize the drugs and instructed staff at the New England Compounding Center in Framingham to use expired ingredients and ignore cleaning.

Chin’s attorneys argue the pharmacy’s co-founder is to blame. Barry Cadden was sentenced to nine years in prison after being convicted on conspiracy and fraud charges and acquitted of second-degree murder.