( CNN ) -- Police in California arrested Wednesday a woman they said is suspected of killing a nursing student who was last seen in a hospital parking garage more than three months ago . Giselle Esteban , 27 , was arrested in Union City , California , Wednesday , Lt. Roger Keener of the Hayward Police Department told reporters . Evidence -- including blood stains , security camera footage , cell phone records and DNA found on a shoe -- led to Esteban 's arrest `` for the murder of Michelle Le , '' Keener said . Esteban was arraigned on Wednesday afternoon and was listed as an inmate in an Alameda County jail without bail . Le , a 26-year-old nursing student , disappeared on May 27 after telling classmates at a hospital in Hawyard , California , that she was going to get something from her car , Keener said . She never returned and the abandoned vehicle was later found about a half-mile away . Investigators searched Esteban 's house shortly after Le disappeared . As part of that search , Keener said , they found Le 's DNA on one of Esteban 's shoes . Police have classified the case as a homicide , but her family has held out hope for her safe return , CNN affiliate KGO reported . Le 's family has offered a $ 100,000 reward for her return or for information on her whereabouts . `` At this point she is still missing and we will fight to bring her home every day until we have her with our family again , '' cousin Krystine Dinh told reporters after police announced Esteban 's arrest Wednesday . Le 's 23-year-old brother , Michael , told reporters that Thursday will be his birthday -- a day his sister would always call him . `` I just want to hear her voice so badly , and the only thing I 'm going to be wishing for is for her to come back home , '' he said . Keener pledged that police would continue their search . `` We will not consider this investigation to be complete until Michelle is found , '' he said .
NEW : Police say DNA evidence found on a shoe helped lead to the suspect 's arrest . NEW : Family members vow to keep searching for nursing student Michelle Le . Le was last seen on May 27 in a hospital parking garage . Police classify the case as a homicide , but family members have held out hope .