The 48-year-old man, who has not been named, is accused of impersonating former senior public officials in written communications to state bodies alleging preparations for attacks on the Polish president and foreign minister.
Along with the false warnings, he allegedly enclosed illegally obtained documents and objects intended both to lend credibility to the letters and to implicate innocent people.
In one letter, he included ammunition.
Police forced entry into a Warsaw flat where they found laptops, USB drives, memory cards, mobile phones, service badges, weapons and ammunition.
They also recovered driving licences, identity cards and residence permits belonging to other people.
In the suspect’s car, officers later found additional ammunition and what police described as ten artillery shells.
The lawyer faces seven charges, including concealing documents belonging to other people and illegal possession of weapons and ammunition, and could face up to eight years in prison.
A court granted prosecutors' request to remand him in custody for three months.
Kierwiński said the case was separate from recent arrests linked to hoax emergency calls targeting politicians and media figures.
"Another arrested person in connection with false alarms and impersonation. This time in a different case," he wrote on X.
(ał)
Source: IAR, tvp.info