No - at least it's very, very unlikely. I stumbled upon this here and it seems (according to Google) this rumour is already on Twitter and other websites for more than 10 hours. There are other news about Pfizer which are more recent.
So it seems it's the typical fake news of this kind of websites. Maybe also somebody wanting to buy Pfizer stocks cheap.
See here:
Pfizer CEO Albert Bourla Was Not ArrestedSo proof as a potential other fake news site? Snopes unfortunatly did not pass the fakt check.
Whit a lame fraud case he would be out on bail anyway.
The other vaccine manufacturer took a massive hit on the market
The police have ordered a media blackout, which was immediately approved by a judge.