Indiana State Police are again urging users of social media to stop posting pictures of men alongside the composite sketch of the Delphi murder suspect.

"As we continue the investigation into the deaths of Abby and Libby, please refrain from posting pictures on social media sites of innocent people set side by side with the sketch and picture of the alleged suspect," state police posted Friday on their Facebook page.

Investigators have received hundreds of tips since last July when they released the composite sketch of the man they believe killed 14-year-old Liberty German and 13-year-old Abigail Williams. The girls went missing Feb. 13 while hiking near Monon High Bridge in a remote area east of Delphi. Their bodies were found nearby a day later. The case remains unsolved.

The crime has caused a sensation and has drawn intense interest from members of the public. Last summer, almost immediately after the release of the FBI artist's sketch, users of social media began posting photographs of men alongside the sketch. State police implored them to quit.

"Those are of no value and take up investigative time," ISP spokesman Dave Bursten said at the time.

The state police urged them to stop for the second time Friday afternoon. By posting such photographs, an ISP Facebook post said, "you take away the from the investigation by slandering and possibly hurting those people and their families. Everyone is innocent until proven guilty in a court of LAW. If you feel someone might be the suspect, please notify the tip line at (844) 549-5786 or the email address abbyandlibbytip@cacoshrf.com. Do the right thing and help us solve the case and not cause unwanted pain and grief to those who may be innocent!"

The person in the sketch is described as a white male between 5-foot-6 and 5-foot-10-inches tall, weighing 180 to 220 pounds, with reddish brown hair and an unknown eye color.

► More:Tips increase after Delphi girls featured on 'Dr. Phil Show'

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► More:After killings, Delphi residents pull together amid unease

Contact IndyStar reporter Will Higgins at (317) 444-6043. Follow him on Twitter @WillRHiggins.