A man from Sydney, Australia, who used the gay hookup app Grindr to lure and rob men at knifepoint was sentenced to at least 17 months in jail Tuesday, the Sydney Morning Herald reports.

Corey Draper, 23, was accused of locating and contacting his victims via Grindr. After chatting up the men he met online, Draper suggested a place and time to meet in person so they could "smoke ice," slang for meth.

In one instance, Draper met a 28-year-old man from Waterloo, Australia, around 1:30 a.m. on Feb. 9, 2014. The man gave Draper $200 to buy ice but Draper pulled a knife out on the victim, taking his wallet and stealing $270 in cash, along with the man's cell phone. Draper, who gave the wallet back to the man, threatened to kill him if he contacted police. The victim did call the authorities, however and forensic investigators found Draper's DNA on the man's wallet.

On Feb. 10, 2014, Draper met with a 48-year-old man around 2 a.m. after talking on Grindr. Draper got into the man's car and threatened him with a knife, telling him to drive.

"Just do it or I will kill you. I have killed before," Draper allegedly said.

The Sydney Morning Herald reports the victim managed to escape and call police, who also found DNA in the victim's car.

Draper was arrested on Feb. 13, 2014 and charged with robbery armed with an offensive weapon and being armed with intent to commit an indictable offense. He pleaded guilty.

Judge Gregory Hoskings said Draper, who also stole cash, a meth pipe and a phone from an apartment of another man he met on Grindr, had a dysfunctional childhood, a criminal record and a serious drug habit that started when he was 16.

Draper, who has a girlfriend, was sentenced to a maximum of 33 months in jail with a non-parole period 17 months. He will be eligible for parole on Oct. 2.

From our media partner EDGE