Police said Danelo Cavalcante may be “desperate enough” to use that weapon.

As Cavalcante fled, the resident gun owner fired a pistol at him. However, it is believed that he escaped the shoot out unscathed.

It has been urged that residents secure their properties and vehicles.

A perimeter of roughly 10 square miles (26 square kilometers) is being scrutinized by more than 500 officers in South Coventry Township, north-west of Philadelphia.

Last month, Cavalcante, a Brazilian national, was sentenced to life in prison for killing his ex-girlfriend.