Greek authorities have charged an asylum-seeker after his six-year-old son drowned when the boat they were using to cross from Turkey capsized.
The Afghan man is accused of having endangered his son's life - reportedly the first such case in the country.
The dinghy sank off Samos Island on 8 November. The man made it to shore and sought help, but his son's lifeless body was found the next morning.
Thousands of migrants have arrived in Greece from Turkey so far this year.
More than 1,400 have landed on Samos island alone, the UN says.
The 25-year-old Afghan father could face a six-year prison sentence if found guilty of putting his son's life at risk.
His lawyer told the BBC that although a distress call went out to the coastguard at midnight, they only sent a vehicle to look for the body six hours later.
The lawyer argues that police should investigate that delay - not the actions of the father, who went into the town to seek help after making it to land.
A coastguard spokesman said the initial search did not find the vessel - and that darkness had hindered their work.
What's the background?
In 2015, hundreds of thousands of migrants - mainly fleeing conflict in Afghanistan and Syria - tried to reach Europe via Turkey. Hundreds downed in attempted crossings to Greek islands.
A year later, Turkey agreed to stop allowing migrants to reach the EU, in return for funds from the bloc to help it manage the huge numbers of refugees it hosts.
But since then, tensions between the EU and Turkey have flared on various issues. Although the EU promised more aid, Turkey was unimpressed and earlier this year briefly opened its borders with Greece.
A new surge in arrivals exacerbated tensions on Aegean islands, where asylum seekers have been living in overcrowded camps and many residents resent their presence.
In September more than 12,000 people were left homeless by a fire that destroyed a camp on Lesbos island. Four Afghan migrants have been charged with starting it.
The government is determined not to allow the country to be seen as a gateway to Europe and is actively deterring new arrivals.