'ongoing trial' is correct and usable in written English.
You can use it when referring to a trial that is currently happening or ongoing. For example: "The ongoing trial will determine the fate of the accused."
"It's quite another thing for them to read about it every day in an ongoing trial.
This week's least comedic comedy story – the ongoing trial of Justin Lee Collins.
Now there is an ongoing trial at the UN and I hope there will be justice.
"It would be desirable, though, if the media showed some restraint, because this is an ongoing trial".
The Operation Puerto scandal and ongoing trial of Eufemiano Fuentes will ensure doping in cycling remains in the headlines.
Rhian Lewis, 49, was given the retinal implant as part of an ongoing trial at Oxford's John Radcliffe Hospital.
The daughter and son of the murdered journalist both gave evidence today in the ongoing trial of three men in connection with her shooting in 2006.
Karadžić also had argued that reinstating the charge would "disrupt the ongoing trial … and would represent an irresponsible use of public funds," Meron said.
Even the ongoing trial in The Hague of Ratko Mladić, the Bosnian Serb military chief, has not been broadcast on TV or radio channels.
The ongoing trial of the People's party's former treasurer Luis Bárcenas has revealed the extraordinary levels of corruption at the heart of Spanish political and business life.
Recent signs of a clampdown include the ongoing trial in Abu Dhabi of five pro-democracy activists accused of undermining public order by seeking free elections.
