NEED TO KNOW

Haili Strickland is opening up after Megan Trussell, a University of Colorado freshman, left their dorm on Feb. 9 following an argument and was found dead six days later

"I go on campus and I see places that we've hung out, or I'll see things that remind me of her, or I'll hear a song that reminds me of her,” Strickland says

Authorities say Trussell died of suicide from amphetamines, apparently Adderall, but her parents suspect foul play

One of the last known people to see Megan Trussell alive — her roommate — is opening up for the first time about the 18-year-old college freshman whose death remains at the center of controversy in Boulder, Colo.

“She was a once-in-a-lifetime kind of person,” Haili Strickland tells PEOPLE of Trussell. “Her heart and the way that she car

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