On Tuesday, the Cedar Valley Crime Stoppers announced they have upped the reward for any information in the cases of missing Evansdale cousins Lyric Cook and Elizabeth Collins.

The two went missing July 13, 2012, and were later found dead. No arrests have yet been made but authorities have looked at more than 300 sex offenders and interviewed over 1,000 people in the case.

The cause of death and autopsy have never been unveiled, as authorities believe that is information only the killers would know. A $50,000 reward is now payable to anyone with information, you are asked to call Crime Stoppers, 855-300-TIPS (8477).

You may also text the word CEDAR along with any tips you have to 274637 (Crimes). Additionally, you can visit Cedar Valley Crime Stoppers online, or call the Evansdale Police Department at 319-232-6682 or send an email tip to ourmissingiowagirls @dps.state.IA.US

[Via Cedar Valley Crime StoppersKCRG]