Michael Kevin Lallana, 31, of Fullerton, a field director for Northwestern Mutual Investment Services, was charged with two misdemeanor counts of releasing an offensive material in a public place and assault on two separate occasions.

Lallana who is a company executive was arrested Tuesday after DNA recovered from a female co-worker’s water bottle revealed he allegedly put semen into that bottle that she later drank from according to Orange County prosecutors.  Prosecutors claimed Lallana committed the crimes earlier this year for sexual gratification.

The first incident allegedly occurred Jan. 14. On that day, he left a semen-laced bottle of water on the victim’s desk, and when she returned later, she drank from it. She fell ill and threw the bottle away, prosecutors said.

Three months later, prosecutors claim, Lallana repeated the act after the pair had been transferred to a different office. The woman, whose identity was withheld by prosecutors, again felt ill. Suspicious of the water’s contents, she sent it to a lab for analysis. In June, the private lab warned the woman that the bottle contained semen. She reported the incidents to the Orange Police Department and investigators later obtained Lallana’s DNA, which matched that found in the water bottle.

He is scheduled to be arraigned Sept. 14 2010.  If convicted, he faces up to three years in prison with mandatory sex-offender registration.

Orange County Deputy Dist. Atty. Bobby Taghavi said investigators were able to key in on Lallana because he worked at both locations where the incidents occurred. During the investigation Lallana eventually volunteered to provide a sample of his DNA for testing, Taghavi said.

“These are not charges you see every day,” Taghavi said.