Over the course of her life, Mary Jean D'Agostino met and befriended a wide range of characters -- one of whom, cops believe, strangled her to death on August 29, 1993.
An unknown assailant strangled Mary Jean D'Agostino to death in an apartment building hallway. To this day, investigators still work this case with a deep passion, hoping to bring justice to Mary Jean and closure to her family.
Cops cordoned off Mary Jean's vehicle, parked outside of the residential crime scene location in East Lansing, Mich.
Inside this very building, cops found Mary Jean D'Agostino strangled to death in a dimly lit corridor. More than 15 years have passed and cops are still seeking answers to find out who committed this most heinous act.
Mary Jean, pictured in the arms of an ex-boyfriend, lived a free-spirited existence, which cops would like to know more about.
In this page taken from Mary Jean's journal, she writes about her sleep patterns, the meds she's taken, her medical ailments, the numerous activities she'd taken part in and people she'd talked to, over the course of three days in July 1993.