A Brooklyn jury Monday began deliberations in the case of a man accused of fatally stabbing a 6-year-old boy and seriously wounding his 7-year-old pal in an elevator — and they needed a refresher course on the evidence after a 10-day hiatus.

The jurors, who had been off over the Easter/Passover break, started out requesting a video of suspect Daniel St. Hubert coming and going from the homeless shelter where he was living on June 1, 2014, when the attack occurred.

Their other three notes sent out over the course of the day included requests for information about when the murder weapon was tested for DNA. It had St. Hubert’s genetic material on it.

They also asked for testimony from survivor Mikayla Capers, now 11, and about how St. Hubert was ID’d in a lineup.

St. Hubert’s lawyer, Howard Greenberg, has called Mikayla, the prosecution’s star witness, “a pathological liar.’’