Marzouq, the son of the man suspected of being the Yanbu serial killer, has told police he watched his father stab a maid to death, according to authorities. Police, who wanted to interrogate Marzouq about the rapes and murders at a time when his father is being detained at Al-Balad Police Station in Yanbu, found him after a two-day search, authorities said. Marzouq admitted to investigators that he saw the maid run from their old house at Al-Ossaili District in Yanbu after she and his father had an argument. The woman ran toward Al-Nami Souq and his father, brandishing a knife, chased her, caught her, stabbed her to death. The father is being held on charges of murdering three foreign housemaids. Marzouq said he was away in the last two days enjoying the Eid break at amusement parks, according to police. Despite the difficult living conditions being experienced by the suspected serial killer's brother-in-law, Ahmad Hassan, he offered to house his sister and her six children after their landlord expelled them from their home. The woman and her children had been homeless for two days, Hassan said. Hassan said he would ask the charitable society in Yanbu to secure an appropriate house for his sister and her children and urged authorities to help them, regardless of her husband's case. The suspected serial killer's second son, Ahmad, is still missing. There have been reports in the last few days that he was seen roaming on the streets near Al-Shawam Market in Yanbu. Other reports indicate that Ahmad is staying with relatives in Makkah who have reformed his attitude and convinced him to stop stealing.