(purely personal views as always, based on two decades of prior research and publications)
From the 630 am broadcast of Kossuth Radio on 23 December 1989 (Hungarian Monitoring transcripts of Radio Free Europe in Munich, Germany) http://storage.osaarchivum.org/low/c5/b8/c5b829b1-9021-414f-a83b-c90d3e5739c3_l.pdf :
Sandor Koos discusses in an interview (presumably performed on the evening of 22 December 1989 before nightfall based on the discussion of coming nightfall) from Timisoara how he and civilians found 9 Securitate members on the property of the Hotel Timisoara next to the Opera building in the center of Timisoara, took their guns and turned them over to the Timisoara military garrison. (p. 1752)
Alexandru Kos’s declaration for the military prosecutor, from 14 January 1990:
“[pe 23 decembrie 1989] am fost impuscat…cu o arma de calibru mare si probabil cu gloante dum-dum”
[on 23 December 1989 I was shot by a high caliber weapon probably with dum-dum bullets]
After discussing the exact incident mentioned above in the interview from 22 December 1989 about rounding up Securitate personnel on the grounds of Hotel Timisoara, where he says they had been for several days, he continues: “I saw two of those who shot at me, one in a blue uniform with a white helmet, the other dressed in black with something white on his head.” [in other words, no stupidity here about the Army shooting into itself and into civilians in the confusion of it all…]
From this site http://www.banaterra.eu/romana/procesul-de-la-timisoara-1990-1991-vol-v ]. The following are from Volume V. Alexandru Koos’ courtroom testimony during the so-called Timisoara trial (date of his testimony appears to be 3 October 1990). Koos discusses all of the above incidents in detail, and also the specifics of those detained during these days.
Alexandru Koos who was wounded on the night of 22-23 December 1989 also was treated in Austria however, where both doctors and experts confirmed that the bullet in question was a dum-dum bullet. (p. 600)
Alexandru Koos:
The Archive of the Romanian Revolution of December 1989 