i never met anybody quite like mike gargiulo. >> reporter: while the investigators in california arethey've got their man, there is still one troubling question that concerns them greatly. do you think there are other victims out there? >> i think there's a very real chance. >> we've got evidence, some statements, from mr. gargiulo and other people that indicate that 10 might be... 10 might be the magic number. >> we know that mike gargiullo traveled a little bit between illinois and california. we would certainly love to hear from investigators or other witnesses, people that have knowledge that maybe knew him or ran into him at some point. >> reporter: in the meantime, with gargiulo finally behind bars, los angeles investigators will wait for justice to run its course. >> now, it's up to the jury. >> reporter: what are you hoping for at trial? >> conviction. >> reporter: and sentencing? >> the whole nine yards, whatever the jury finds appropriate. >> reporter: the whole nine yards in this state is the death penalty. >> yes, ma'am. >> reporter: but for the pacaccios, that won't be e

i never met anybody quite like mike gargiulo. >> reporter: while the investigators in california arethey've got their man, there is still one troubling question that concerns them greatly. do you think there are other victims out there? >> i think there's a very real chance. >> we've got evidence, some statements, from mr. gargiulo and other people that indicate that 10 might be... 10 might be the magic number. >> we know that mike gargiullo traveled a little bit between illinois and california. we would certainly love to hear from investigators or other witnesses, people that have knowledge that maybe knew him or ran into him at some point. >> reporter: in the meantime, with gargiulo finally behind bars, los angeles investigators will wait for justice to run its course. >> now, it's up to the jury. >> reporter: what are you hoping for at trial? >> conviction. >> reporter: and sentencing? >> the whole nine yards, whatever the jury finds appropriate. >> reporter: the whole nine yards in this state is the death penalty. >> yes, ma'am. >> reporter: but for the pacaccios, that won't be e

mike gargiulo is a powerful young man. >> hollywood hills, 2001 a 22-year-old believed to be after ashtontabbed to death. >> i knew they were going to be hanging out, going to a grammy party. >> it was grammy night. >> picking her up to take her to a party. >> kutcher arrived around 10:45 that night and ashley never answered her door. >> the body of 22-year-old ashley lauren he will rin was found by her roommate early thursday morning. police say the stabbing happened wednesday night. >> the injuries that she suffered were horrific. >> 2005, a 32-year-old woman is stabbed in her home. >> there were multiple stab wound, not just a couple. tricia greatly resembled the other victims in california. they were all young, attractive, female. >> i feel with what we know today, between illinois and california, michael gargiulo may be a serial killer. >> late yesterday, we filed a criminal complaint in court charging michael gargiulo with first degree murder in the brutal slaying of pa catch owe. >> to me, it was the first step. >> he will eventually be brought back here to illinois. we're going to