Details have emerged of a high class prostitute injected heroin into a Google executive on his yacht in California, USA, leaving him to die when he overdosed.

Alix Tichelman, 26, appeared in court on Wednesday on manslaughter and heroin charges. She was arraigned in handcuffs and a red jumpsuit, did not enter a plea and was appointed a public defender. She is being held on $1.5m bail.

Surveillance footage from the yacht shows Tichelman gather her belongings, including the heroin and needles, step over the 51-year-old victim’s body to finish a glass of wine and then lower a blind before leaving the boat, Santa Cruz police said.

Police said Tichelman did not provide first aid or call emergency services as the man, identified as Forrest Timothy Hayes, suffered medical complications and lost consciousness during the November overdose aboard his 50ft (15-metre) yacht, Escape. His body was discovered the next morning by the boat’s captain, police said.

Police are also investigating Tichelman in connection with a similar incident in another state, the Santa Cruz deputy police chief, Steve Clark, said. “There’s a pattern of behaviour here where she doesn’t seek help when someone is in trouble,” he said.

Assistant district attorney Rafael Vazquez said authorities are still investigating the case and may file more serious charges.

Tichelman was arrested on July 4 after police said a detective lured her back to the Santa Cruz area by posing as a potential client and reaching agreement on a price of more than $1,000.

Police said Tichelman, who boasted she had more than 200 clients, met her clients through the website SeekingArrangement.com, which purports to connect wealthy men and women with attractive companions. Her clients included other Silicon Valley executives, Clark said.

•Adapted from a Guardian of London report. Photo shows Alix Tichelman, who is charged with killing Google executive Forrest Timothy Hayes.