The 38-year-old mom who shot her two school-aged sons while they slept last week is now facing first-degree murder charges following the boys’ death Friday, with cops revealing she planned the killings for more than a week.
Philadelphia police said Tuesday that Trinh Nguyen acted premeditatedly when she carried out the killings of sons JT, 13, and Nelson, 9, last Monday, revealing she penned a note a week prior describing what she wanted done with the kids’ ashes.
‘Please call 911!’ one…