Bobbi Kristina Brown Update: Nick Gordon Continues Twitter Rant As She Shows No Improvement

Bobbi Kristina Brown’s boyfriend, Nick Gordon, took to Twitter to his anger at the Brown family for not allowing him to visit the 21-year-old, who remains in a medically induced coma at Emory University Hospital in Atlanta, Georgia. Gordon had previously pleaded to grant him permission to see Bobbi Kristina.

The daughter of late Whitney Houston and Bobby Brown has shown “absolutely no signs of life lately,” sources told Fox411 on Friday. Bobbi Kristina was found unresponsive in the bathtub in her suburban Atlanta home on Jan. 31. She recently suffered seizure when doctors tried to take her out of the coma.

Bobbi Kristina addressed Gordon as her husband though her father’s lawyer claimed that she was never legally married.

Police have launched a criminal investigation into Bobbi Kristina's case after injuries were found on her body. However, Daphne Barak, Gordon's friend, reportedly claimed that he told her over the phone that Bobbi Kristina's injuries were caused during Gordon’s desperate bid to revive the aspiring actress as he waited for paramedics to arrive.

"Foul play is being investigated, including drug use and possibly cover-up to remove evidence from the crime scene," a family source recently told People magazine.