A computer specialist convicted of raping two women after taking them home and drugging them was previously jailed in the US for attacking another woman.
Kapil Garg, 34, originally from India but living in Whitefriar Place in Dublin 8, had denied the charges but was found guilty by a jury of the offences, which took place in his rented room in July 2011.
The Central Criminal Court heard Garg was a "well-educated and well-travelled cosmopolitan man of the world", with a MA in computer science in California.
The jury was told he met the two women outside a nightclub at 3am and invited them back to his home on the understanding he would give them ecstasy.
Both women said he gave them each half a pill and raped them.
Gardaí later found 360 anti-depressant tablets, which had sedative properties and were not available in Ireland.
Garda John Paul Holland told the court that Garg has three previous convictions in the US, including one for breaking-in to a motel room and getting into bed with a woman.
He was sentenced to 60 days in Los Angeles County Jail, and 30 days probation for battery.
Mr Justice Barry White was also told that the victims had rejected and were repulsed by an offer of €20,000 from his family, that their lives will never be the same again, and that they will regret their decision to go to a stranger's home for the rest of their lives.
Defence counsel said Garg accepted the jury's verdict and apologised to his victims.
He also said his client was having a hard time in custody and had been attacked in prison.
Garg is due to be sentenced tomorrow.