Final answer:
Dorothea Puente was a serial killer who targeted vulnerable individuals in 1980s Sacramento, primarily using poison as her method of murder for financial gain.
Step-by-step explanation:
**Dorothea Puente**, also known as the 'Death House Landlady,' was a serial killer who operated in Sacramento, California in the 1980s. Her **modus operandi** involved luring vulnerable individuals, mostly elderly and disabled, into her boarding house and then murdering them for financial gain.
Puente targeted victims who were **isolated** and unlikely to have people checking up on them regularly, making it easier for her to conceal her crimes. Her preferred method of murder was **poisoning**. She would administer lethal doses of prescription medication or drugged food to her victims.
Her motive for killing her boarders was primarily rooted in **financial greed**. Puente would cash in fraudulent social security checks, steal her victims' valuables, and sell their belongings for profit. This pattern of exploiting her victims for personal gain allowed her to maintain a steady income while she carried out her heinous crimes.
Learn more about Dorothea Puente and her modus operandi