Police in London issued some "friendly advice" after arresting the man.
The newlywed police officer was killed in August while responding to reports of a burglary.
The couple's child was due in April.
A burglar who cut himself breaking into a Pizza Hut in Sunderland, returned to the scene to try to wash away his own blood with a bottle of Pepsi. William Trotter admitted a charge of burglary and will be sentenced later on, after being caught on CCTV.
"It would be difficult to think of a greater depravation of the dignity of the dead."
Arthur Gumbley died in hospital from injuries he suffered three weeks earlier.