Wasn't Senna's car impounded for years whilst the trial went on?
I assume the same thing might have happened to Roland's too. But I'm not sure his accident was under investigation for as long.
But once released, I presume both were destroyed, as has been said.
Yeah the authorities in Italy are quite hands-on if there's a fatal accident. I'm sure the cars were impounded, but from memory the evidence in the Simtek case was pretty clear that there was nothing wrong with the car as such, other than damage sustained when it was driven over a kerb, and so no third party was to blame.
The way authorities react to fatalities, and the way F1 in turn reacts, is quite a thorny issue, actually. It's quite troubling, if you look into it. There were a lot of allegations at the time that both drivers who lost their lives during the Imola 1994 race weekend were subject to continued attempts at resuscitation for some time after the point where it was clinically futile, because a view was allegedly taken that if anyone was going to die, they shouldn't die at the track. It should be noted, though, that further attempts to save both men were made after they arrived at hospital, which suggests to me that medics at the track were right not to give up on them.
I never really took that kind of talk seriously until the 2001 Australian GP where a spectator marshal lost his life. A coroner's inquest was held and the findings were made public. The coroner in that case found that the poor chap had died within seconds of the crash, but that unnecessary resuscitation attempts continued trackside, in the ambulance, at the trackside medical centre and in the chopper, for around 20 minutes, until the marshal arrived at the local hospital. There was a subsequent professional misconduct hearing where the doctors who ordered the resuscitation to continue were cautioned, after it emerged they had been following a protocol which called for resuscitation to continue in all cases, and that one of them had ordered medical records to be changed so that the official time of death would come after the marshal arrived at the hospital, rather than when he was still at the track.
We can only speculate as to why that sort of thing went on, but concerns about authorities turning up and impounding stuff, sealing off parts of the track, and disrupting the event generally, are the only plausible explanations that come to my mind.