A mother was arrested at a Ferndale school for allegedly delivering a syringe full of heroin to her son.

Sheila Black, 41, of Metamora, was arrested in the parking lot of Ferndale High School on Pinecrest Street Tuesday during the school's lunch hour, according to a report in The Daily Tribune. Police said they set up surveillance of Black after they received a tip that she was planning to give the heroin to her son.

"She took one of the packs of heroin and cooked it up in a spoon and drew the liquid into a syringe so he could take it into a bathroom at school and shoot it up," said Ferndale police Detective George Hartley in the paper's report.

The teen, whose age was not available, lives with his father in Ferndale, the paper reported. Black has been remarried and there is a court order from Lapeer County barring her from having contact with her son, according to police.

Officers were able to arrest Black in front of the school before she was able to give the drugs to her son because she was in violation of the court order, the paper reported.

Hartley said officers searched Black's Ford pickup truck and found a cosmetic bag with 10 packs of heroin and a loaded syringe.

Black told police she talked to her son over the weekend and agreed to obtain heroin after he threatened to harm himself if he did not get the drugs, the paper reported.

Hartley said the son told his mother to drive to Detroit to purchase the heroin, and she complied.

Black was charged Wednesday with possession of less than 50 grams of heroin with intent to deliver, the paper reported. A $5,000 cash bond was issued during the arraignment.

A pretrial report says Black has mental health and substance abuse problems and should be counseled while awaiting the trial, the paper reported. Police said Black has no criminal record.

Black is scheduled for a preliminary hearing on Feb. 10.