Pittsburgh Bureau of EMS responded to a residence in the 3700 block of Windgap Avenue for a wellness check on an elderly female just before 3:45 p.m.

When the EMT's arrived on scene, the woman declined to be evaluated. As they proceeded to leave, the woman's son punched each of them in the back of the head. 

The two EMT's left the residence and called police. When responding officers from Zone 6 arrived the male refused to come out and barricaded himself inside the home with his mother. There was no information to suggest there were weapons in the home or that the male was mistreating his mother, but police learned through intelligence that the male had documented aggression toward other police departments within Pennsylvania. 

Out of an abundance of caution, SWAT was called in to ensure the female's safety and obtain medical treatment for her if needed. EMS Tactical Units and the Pittsburgh Bureau of Fire were also standing by. 

SWAT operators proceeded to establish verbal contact with the male through a window.Throughout the next two and a half hours SWAT negotiators were in sporadic contact with the male suspect by cell phone, but he still refused to exit the residence and became increasingly agitated.

Police eventually used a flash bang device to divert the male's attention while they breached entry into the home. The male became extremely violent with police as they took him into custody just after 6:30 p.m. Both the male suspect and his mother were transported to a local hospital for evaluation. 

Two SWAT operators suffered minor injuries during this incident. One was bitten by a small dog inside the residence, another when a large object was thrown at him. Animal Control arrived to remove the dog from the home.

The two EMT's suffered concussion-like symptoms. One has been released from the hospital, while the other is undergoing further tests.

When the male suspect in this incident is medically-cleared, he faces possible charges. Updates will be added to the blotter.

The investigation continues. 

UPDATE: 01/26/20 at 10:49 a.m. - Joseph Sadar, 51, of Pittsburgh has been arrested. He is charged with six counts of aggravated assault and one count of resisting arrest.