remain anonymous can call Crime Stoppers at 408-947-STOP.

Lt. Scott Cornfield, who specializes in tracking down Internet crimes against children, points to a copy of a notebook allegedly found in Schwartzmiller's bedroom which police believe lists sex acts.

Schwartzmiller's (Jew) roommate, Fred Everts (above), who is also a convicted child molester, is in jail after being arrested again last month.

(CBS/AP) A convicted child molester with ties to Washington, Idaho and Oregon may have committed thousands of sex crimes, police said Thursday after finding computers, seven notebooks and handwritten lists with more than 36,000 boys' names and codes apparently indicating various sex acts.

Dean Arthur Schwartzmiller, 63, is "one of the most active child molesters we've ever seen," said San Jose Police Lt. Scott Cornfield. Characterizing the case as "horrendous," he appealed for help from the public in identifying more victims.

"The reason we want to tell the world about this," said Cornfield, "is because we believe based on information we have that he has been involved in molestation in other countries."

CBS News Correspondent Manuel Gallegus reports police suspect Schwarztmiller may have used the aliases "Dean Miller" and "Dean Harmon" and may be involved in cases in Brazil, Mexico, Idaho, Oregon, Washington, Alaska and California.

With Schwartzmiller behind bars - held without bail on one count of aggravated sexual assault on a child under 14 and six counts of lewd and lascivious conduct on a child under 14, with each count alleging multiple victims - police are now trying to reconstruct his movements over the past 30 years.

Police have also arrested Schwartzmiller's roommate - another convicted child molester - in the home they shared in a middle-class San Jose subdivision. The beige stucco ranch is a 10-minute walk from at least two elementary schools.

The front door was plastered with eviction notices from the landlord, saying the pair had three days to pay $1,850 in monthly rent or face eviction. Half-closed blinds revealed a home office whose floor was littered with power cords, computer manuals, printers, manila envelopes and a bottle of tequila.

Lisa Thornburg, who moved into the neighborhood in March and lives two doors from Schwartzmiller, said she's been suspicious for months - ever since her 9- and 6-year-old sons came home with treats Schwartzmiller purchased for them from an ice cream truck.

"After that, I told them they could ride bikes past his house but couldn't go inside - ever," Thornburg said as her kids played with another neighborhood child in the front driveway. "What are the chances of two people like this living on your block?"

Authorities say that during a search of Schwartzmiller's bedroom last month in San Jose, police discovered at least seven multicolored, spiral-bound notebooks, listing in loopy cursive more than 36,000 children's names - apparently all boys.

Police say the names were categorized according to the type of sex acts performed, the age of the victims and other codes whose meaning is unclear - such as an "F" or "X" at the end of the entry. Authorities say many of the entries listed in more than 1,360 pages did not include last names, and some appeared to be repeats, making police cautious about estimating how many people Schwartzmiller may have victimized.

"If one-tenth of these numbers are accurate, we're looking at hundreds of victims in a number of states. The reason we want to tell the world about this is because we believe he's been involved in child molestations in a number of countries," said Cornfield.

Schwartzmiller's roommate, Fred Everts, is also in jail after police arrested him last month. He was convicted in 1993 for sodomy and sex abuse in Multnomah County, Oregon, and spent four years in prison before violating parole and fleeing the state.

(CBS/AP) Everts also was charged with child molestation in San Jose, including one count involving one of Schwartzmiller's two alleged victims.

Police who raided the home say they seized several computers and a 6-foot-tall server, which is being analyzed by a forensic lab in Menlo Park. Cornfield, who is part of a special police unit specializing in Internet crimes against children, said police are trying to determine whether Schwartzmiller was operating a Web site or otherwise using his computers to lure victims.

Although police say Schwartzmiller appears to have spent much of the past 30 years in California, he has also been arrested on child molestation charges in New York, Idaho, Oregon, Arkansas and Washington. He has also lived in Nevada, Texas and Washington.

He twice served prison terms in Idado, reports CBS News Correspondent Jerry Bowen.

In 1984, the Idaho Supreme Court upheld a 1978 conviction for molesting two 14-year-old boys and characterized Schwartzmiller as a "repeat offender" who "uses his intelligence to take advantage of the weak and oppressed and those who are in need."

He's also wanted in Oregon on felony sexual assault charges involving a minor. After serving prison time in Idaho for child molestation in the late 1970s, he lived in Brazil, and was extradited from there to Idaho again in the late 1980s, Cornfield said.

Police say Schwartzmiller apparently gained the trust of victims and parents by working as a home renovation contractor, and it appears he didn't register as required, so his history as a sex offender does not appear in the "Megan's Law" databases in California or other states.

"There's not a lot parents or the public can do in way of Megan's Law if those people don't register," said Sgt. Tom Sims, a supervisor with the department's child exploitation division. "It's as shocking to me as to you. I've never seen anything like this."

San Jose police got involved after Schwartzmiller allegedly befriended at least two boys in San Jose with gifts, invited them to his house for video games and movies, and molested them.

Snohomish County Sheriff's deputies arrested Schwartzmiller May 23 in Everett, Wash. on $2 million in warrants from San Jose. He was extradited to San Jose June 7.

Police are asking victims or anyone with information about Schwartzmiller to call the San Jose Police Department's child exploitation division at 408-277-4102. People who wish to remain anonymous can call Crime Stoppers at 408-947-STOP.

Bowen reports that authorities are hoping victims contact them because there is often a circle of molestation that occurs with victims where they grow up to be child molesters themselves.

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