After their mother Andrea passed away in January, Tristan Thompson stepped up to become Amari’s primary carer and has now sought to become Amari’s legal guardian.

On Friday, the NBA free agent and ex-partner of Khloé Kardashian sought sole legal guardianship of his 17-year-old sibling through legal proceedings.

According to court records acquired by PEOPLE, Tristan Thompson, 32, claims he is his younger brother Trevor’s only living relative capable of providing the care he needs because his father Trevor has been away from the family’s life since 2014.

Thompson wants to gain guardianship so that he can give 24-hour care for Amari, who suffers from epilepsy and other medical issues.

According to the papers filed in court, “Amari is a minor and has medical conditions that render him unable to care for himself or seek gainful employment.”

According to the papers, Amari has been staying at Tristan’s house in Hidden Hills, California.

The statement goes on to explain that it would be in Amari’s best interest to have a guardian appointed so that someone would be responsible for meeting his basic requirements. Furthermore, Amari will receive a small legacy from his recently deceased mother, Mary, and a guardian would not be able to manage and invest in Mary’s fortune on his behalf.

Amari has reportedly gotten $103,475 from his mother’s inheritance, as evidenced by court papers. It was decided that Tristan would assume responsibility for safeguarding the inheritance and coordinating Amari’s care and medical appointments. According to the filings in court, Tristan also intends to file for Amari to be granted U.S. citizenship. Amari was born in Canada.

Andrea, mother to Tristan and Amari, passed away on January 5 after a heart аttаck at her home in Toronto. The first news outlet to break the story was TMZ Sports.

Tristan went to Toronto to visit Khloé, who is close to Andrea, and the rest of his family.