OAKLAND -- The last two phone calls that Nina Reiser made on her cell phone before she was last seen alive on Sept. 3, 2006, were to her estranged husband Hans Reiser, according to testimony at his murder trial.

Verizon Wireless custodian of records Jody Citizen said Nina made a 62-second phone call to Hans Reiser's home at 6979 Exeter Drive in the Oakland hills at 1:40 p.m. that day and a 22-second call at 2:04 p.m.

That timeframe is consistent with previous testimony and videotapes in Hans Reiser's lengthy trial which indicated that Nina was shopping with her young son and daughter at the Berkeley Bowl grocery store at 2020 Oregon St. in Berkeley and went through the checkout line shortly after 2 p.m.

Nina then drove the children to Hans Reiser's house, where she was last seen alive, according to previous testimony.

Citizen said that after the 2:04 p.m. call, there were no more outgoing calls from Nina Reiser's phone and all incoming calls, starting with one at 6:27 p.m. that day from her best friend Ellen Doren, went straight to her voice mail.

When Nina's car was discovered in the Oakland hills on Sept. 9, 2006, police officers found her cell phone but its battery was removed.

Prosecutor Paul Hora told jurors in his opening statement in early November that authorities couldn't track Nina's cell phone because its battery was removed.

Hora also said that Hans Reiser's cell phone battery was detached when he was detained by police on Sept. 28.

Nina Reiser's body has never been found, despite extensive searches in the Oakland hills and elsewhere, but Hans Reiser was charged with murdering her because prosecutors believe that DNA and blood evidence proves that he killed her.

Hans and Nina Reiser married in 1999 but Nina filed for divorce and separated from him in 2004. They were in the midst of an acrimonious divorce and a battle over the custody of their two children when she disappeared.

Hans Reiser has pleaded not guilty to the charges against him.

His attorney, William DuBois, has said he thinks that Nina Reiser may still be alive and be in hiding in Russia, where she was raised and where she was trained as a physician.

Nina's mother, Irina Sharanova, currently has custody of the Reisers' children and is raising them at her home in St. Petersburg, Russia.

Sharanova is scheduled to testify on Monday and Alameda County Superior Court Judge Larry Goodman who is presiding over Reiser's trial, has lined up a Russian translator.

After Citizen stepped down from the witness stand today, Alameda County District Attorney's Inspector Frank Moschetti testified that he helped lead three searches for Nina Reiser in the Oakland hills after she disappeared.

The first was on Sept. 23, 2006, and involved about 175 people, he said.

The second was on Dec. 2, 2006, and the third was on Aug. 19, 2007, Moschetti said.

Asked by prosecutor Paul Hora to describe the likelihood of finding Nina Reiser, Moschetti said, "That is the proverbial needle in a haystack, and Nina Reiser was the needle. Not good at all."

That's because the potential area where Nina could be is "vast," he said.

Even though no signs of Nina were found in the three searches, it hasn't been ruled out that Nina Reiser's body could still be in the Oakland hills, Moschetti said.

In fact, most of the Oakland hills haven't been searched, he said.