Wrongfully convicted man held for 28 years opens up about adjusting to life outside prison

Lamar Johnson was arrested in 1994 for the killing of his friend, Markus Boyd. He spent nearly three decades in prison after a witness picked him out of a police lineup. The witness, Greg Elking, says he was pressured by law enforcement to identify Johnson as one of two men who killed Boyd. 

After a decades-long fight to prove his innocence, Johnson's murder conviction was finally overturned by a St. Louis judge in February — a moment of "relief" for Johnson.

"I felt like 28 years of the struggle was finally being lifted," Johnson told "CBS Mornings" on Thursday.