They confessed to doing this:
http://en.wikipedia.org/wiki/Jos%C3%A9_Medell%C3%ADn"The gang members ran and grabbed Elizabeth and pulled her down the incline, off of the tracks. Testimony showed that Jenny had gotten free and could have run away but returned to Elizabeth when she cried out for Jenny to help her. The confessions of the gang members that were used at trial indicated that there was never less than 2 men on each of the girls at any one time and that the girls were repeatedly raped orally, anally and vaginally for the entire hour. One of the gang members later said during the brag session that by the time he got to one of the girls, "she was loose and sloppy." One of the boys boasted of having "virgin blood" on him.
The 14-year-old juvenile later testified that he had gone back and forth between his brother and Peter Cantu since they were the only ones there that he really knew and kept urging them to leave. He said he was told repeatedly by Peter Cantu to "get some". He raped Jennifer and was later sentenced to 40 years for aggravated sexual assault, which was the maximum sentence for a juvenile.
After the rapes, the gang members took Jenny and Elizabeth from the clearing into a wooded area, leaving the juvenile behind, saying he was "too little to watch". Jenny was strangled with the belt of Sean O'Brien, with two murderers pulling, one on each side, until the belt broke. Part of the belt was left at the murder scene, the rest was found in O'Brien's home. After the belt broke, the killers used her own shoelaces to finish their job. Medellin later complained that "the bitch wouldn't die" and that it would have been "easier with a gun". Elizabeth was also strangled with her shoelaces, after crying and begging the gang members not to kill them; she began bargaining, offering to give them her phone number so they could get together again.
The medical examiner testified that Elizabeth's two front teeth were knocked out of her brutalized mouth before she died and that two of Jennifer's ribs were broken after she had died. Testimony showed that the girls' bodies were kicked and their necks were stomped on after the strangulations in order to "make sure that they were really dead."
I have no pity for these animals. I hope they all die in prison. I hope they are never allowed a single moment of joy or happiness in their lives, EVER.