What's expected to happen today:

The trial of Baltimore police Officer Caesar Goodson Jr. will continue Tuesday with testimony from Detective Michael Boyd, a member of the Baltimore Police Department's Force Investigation Team that investigated Gray's death.

What happened Monday?

» Baltimore police Officer William Porter testified. He said there was no indication that Freddie Gray required immediate medical attention while being transported in the back of an arrest van, but he acknowledged that officers could have safely secured the 25-year-old detainee with a seat belt.

» Neurosurgeon Dr. Morris Marc Soriano testified that Gray's injuries between the second and fourth stop, while catastrophic, could have allowed him to continue communicating with police officers at the later stops. At Porter's trial, Soriano said accessory muscles would allow Gray to keep breathing despite his rapidly deteriorating physical condition.