(CBS) — Chicago police have fatally shot a teen on the South Side, one of five people shot by Chicago Police since Friday and the second in which a suspect has died.

The teen has been identified as Warren Robinson. He was just a week shy of his 17th birthday.

Investigators say they responded to a call of shots fired and tracked Robinson down to an alley near 87th and Sangamon in the Greshman neighborhood.

They found him hiding under a car with a gun in his hand and when they told him to drop it.

“He was told multiple times he was told drop the gun, drop the gun. He is coming out from under the car with the gun in hand. At that point he shot. He is told again after he is shot to drop the gun and he refuses to do so still has his finger on the trigger. The officers again defend themselves,” Fraternal Order of Police spokesman Pat Camden said.

His mother has a different story.

“They shot him over twenty times,” said the victim’s mother, Georgiana Utendahl. “They are trying to say he had a gun on him and he didn’t have a gun on him.”

Witnesses say Robinson kept his hands in the air the entire time. Police say that’s just not true.

It was the second fatality from a police-involved shooting this holiday weekend.

Late Friday, officers were patrolling near Cicero and Berenice when they saw a man holding something suspicious under his arm. As they approached, they realized it was a gun. Officers fired when they say he turned and pointed the weapon at them, a union official said.

Earlier Friday, two men were seriously wounded in separate police-involved shootings in Hamilton Park and Rogers Park.

In another police shooting, police chased a suspect near 70th and Hermitage in Englewood on Saturday. Police say the suspect pointed a gun at police, and officers then shot the suspect. The suspect was taken to the hospital and no officers were hurt.

“What’s even more disconcerting in looking at this situation in total, yes, there were five police involved shootings over the holiday weekend but at last report there were 50 shootings in the city of Chicago total and I think that’s representative of the gang, drug, gun violence problem that still persists in Chicago,” said CBS 2 security consultant Ross Rice.