India, Oct. 23 -- Delhi Police conducted two rare tests of forensic DNA profiling to establish the alleged involvement of four accused in the gang-rape and murder of a 16-year-old girl in outer Delhi's Swaroop Nagar, with a Central Forensic Science Laboratory (CFSL) report confirming the presence of "human semen" and "a mixed male DNA profile corresponding to four males on swabs collected from the victim", officers aware of the findings said on Thursday.

Police said that the body of the girl was highly decomposed and these scientific tests were essential to link the victim to the accused.

"They are essential when the DNA is possibly contaminated and when there is a possibility of multiple DNAs. Hence, the exhibits were sent to Central F...